Sign in

Miguel Costa

@mncgmxpt.bsky.social
221 followers 80 following 409 posts

Research and study of History and Cultural Heritage. Numismatist. Author of the descriptive study on the coinage of Portuguese 400 Reis silver coins. 🇵🇹🇺🇦🇬🇱 #numismatics #ancientcoins #romancoins #ibero-romancoins #coin-enthusiasts #coins

PostsRepliesMedia
Miguel Costa @mncgmxpt.bsky.social · 25/05/2026
Roman silver coin hoard found in field www.bbc.com/news/article... #numismatics #ancientcoins #coin-enthusiasts #romancoins #coins #metaldetecting #archaeology #culturalheritage #museums #ancienteurope #rarecoins #history #romanarchaeology #roman #romanempire #ancientbluesky #historyfiles
bbc.com
Roman silver coin hoard found in Devon field
Experts say it could be the largest hoard of Roman silver coinage known from Devon in recent times.
000
Miguel Costa @mncgmxpt.bsky.social · 14/05/2026
2,000-year-old coin with earliest menorah image returned to Israel after seized in US www.timesofisrael.com/2000-year-ol... #numismatics #ancientcoins #romancoins #coin-enthusiasts #coins #jewishcoins #ancientbluesky #archaeology #culturalheritage #biblicalarchaeology #metaldetecting #museums
timesofisrael.com
2,000-year-old coin with earliest menorah image returned to Israel after seized in US
Joint operation also sees return of 2,500-year-old silver coin, one of two known examples in the world, as officials stress importance of international cooperation to combat looting
020
Miguel Costa @mncgmxpt.bsky.social · 11/05/2026
'Extremely rare' English coins meant to ward off Vikings found in Denmark — because the Vikings wore them as jewelry www.livescience.com/archaeology/... #numismatics #ancientcoins #coin-enthusiasts #coins #metaldetecting #medievalsky #medieval #archaeology #culturalheritage #ancienteurope #history
livescience.com
'Extremely rare' English coins meant to ward off Vikings found in Denmark — because the Vikings wore them as jewelry
Two rare coins minted in England to ward against Viking raids have been discovered in Denmark, where Vikings made them into jewelry.
141
Miguel Costa @mncgmxpt.bsky.social · 07/05/2026
Norway’s largest Viking Age coin hoard has been discovered: "Truly exceptional" www.sciencenorway.no/archaeology-... #numismatics #ancientcoins #coin-enthusiasts #coins #metaldetecting #medievalsky #medievalists #medieval #archaeology #culturalheritage #museums #ancienteurope #rarecoins #history
sciencenorway.no
Norway’s largest Viking Age coin hoard has been discovered: 'Truly exceptional'
The metal detectors searching for coins in a field in eastern Norway still haven’t stopped beeping.
032
Miguel Costa @mncgmxpt.bsky.social · 27/04/2026
Ibero-Roman Coins Denomination: As Mint: MVNICIPIVM GRACURRIS, today is the city of Alfaro, (La Rioga - Spain) Dating: time of Tiberius (14 AD - 36 AD) #numismatics #ancientcoins #romancoins #ibero-romancoins #coin-enthusiasts #coins #romanarchaeology #roman #ancientbluesky
000
Miguel Costa @mncgmxpt.bsky.social · 27/04/2026
Ibero-Roman Coins Denomination: As Mint: CALAGURRIS, today is the city of Calahorra, (La Rioga - Spain) Dating: time of Augustus (27 BC - 14 AD) #numismatics #ancientcoins #romancoins #ibero-romancoins #coin-enthusiasts #coins #romanarchaeology #roman #ancientbluesky
000
Miguel Costa @mncgmxpt.bsky.social · 21/04/2026
6th-Century Fire in Phanagoria Reveals Lost Wallets Filled with Ancient Coins—Including Counterfeits arkeonews.net/6th-century-... #numismatics #coin-enthusiats #coins #ancientcoins #ancientbluesky #archaeology #culturalheritage #museums #rarecoins #history #historyfiles
arkeonews.net
6th-Century Fire in Phanagoria Reveals Lost Wallets Filled with Ancient Coins—Including Counterfeits - Arkeonews
6th-century fire in Phanagoria reveals lost wallets filled with ancient Bosporan coins, including rare counterfeits, offering new insight
020
Miguel Costa @mncgmxpt.bsky.social · 19/04/2026
Uncovering the Bickmarsh Hoard www.explorethepast.co.uk/2026/04/unco... #numismatics #ancientcoins #coin-enthusiasts #coins #metaldetecting #ancienthistory #medievalsky #medievalists #medieval #archaeology #culturalheritage #museums #history
explorethepast.co.uk
Uncovering the Bickmarsh Hoard - Worcestershire Archive & Archaeology Service
A quiet field in south east Worcestershire. No visible traces of the past. No reason to expect what lay beneath. And then, a signal. Within hours, silver coins began to emerge from the soil, one after...
021
Miguel Costa @mncgmxpt.bsky.social · 16/04/2026
2,300-Year-Old Ancient Troy Coin Discovered in Berlin: First-Ever Greek Artifact Found in the City #numismatics #coin-enthusiats #coins #ancientcoins #ancientbluesky #archaeology #culturalheritage #museums #rarecoins #history #ancienteurope #historyfiles arkeonews.net/2300-year-ol...
arkeonews.net
2,300-Year-Old Ancient Troy Coin Discovered in Berlin: First-Ever Greek Artifact Found in the City - Arkeonews
A rare 2,300-year-old Greek coin from ancient Troy was discovered in Berlin by a 13-year-old student, marking the first-ever Greek antiquity
010
Miguel Costa @mncgmxpt.bsky.social · 15/04/2026
Denomination: Dinheiro Authorit: King Afonso I, (first king of Portugal), (1143- 1185). Obverse legend: PORTVGA Reverse legend: ALFOS REX Reference number: Gomes A1.04.04 #numismatics #ancientcoins #coin-enthusiasts #coins #ancientbluesky #culturalheritage
020
Miguel Costa @mncgmxpt.bsky.social · 15/04/2026
Ibero-Roman Coins Denomination: Semisse Obv PERM•CAES•AVG•P•M• Rev LIBERALITATIS•(IVL)•EB-OR• Mint: LIBERALITAS IULIA - EBORA, today is the city of Évora, (Alentejo - Portugal) Dating: time of Augustus (27 BC - 14 AD) #numismatics #ancientcoins #romancoins #ibero-romancoins #coin-enthusiasts #coins
040
Miguel Costa @mncgmxpt.bsky.social · 14/04/2026
'This John the Baptist coin is unique and mysterious' #numismatics #coin-enthusiats #coins #ancientcoins #ancientbluesky #archaeology #ancienthistory #culturalheritage #museums #rarecoins #history #ancienteurope #historyfiles www.bbc.com/news/article...
bbc.com
Fakenham St John the Baptist coin pendant is unique, says expert
The discovery of the gold imitation coin raises more questions than it answers, says a coin expert.
020
Miguel Costa @mncgmxpt.bsky.social · 12/07/2025
How Fake Coins Kept the Roman Empire’s Economy Alive in Its Decline. www.labrujulaverde.com/en/2025/07/h... #ancientbluesky #archaeology #ancienthistory #romanarchaeology #roman #numismatics #ancientcoins #coin-enthusiasts #coins #romancoins #culturalheritage #museums #romanempire
labrujulaverde.com
How Fake Coins Kept the Roman Empire’s Economy Alive in Its Decline
A recent study published in the journal Vegueta reveals how counterfeit coins were key to sustaining the economy in the final centuries of the Roman Empire. The research, focused on the territorium ge...
050
Miguel Costa @mncgmxpt.bsky.social · 30/05/2025
3/3 Rev. SALVTI AVGVSTOR TR P XVI COS III S C Salus, draped, standing left, feeding out of patera in right hand snake coiled round altar. #numismatics #ancientcoins #romancoins #coin-enthusiasts #coins #romanarchaeology #roman #romanempire #ancientbluesky
030
Miguel Costa @mncgmxpt.bsky.social · 30/05/2025
2/3 Obv. IMP CAES M AVREL ANTONINVS AVG P M Head of Marcus Aurelius, laureate, right. #numismatics #ancientcoins #romancoins #coin-enthusiasts #coins #romanarchaeology #roman #romanempire #ancientbluesky
130
Miguel Costa @mncgmxpt.bsky.social · 30/05/2025
1/3 Sestertius - RIC III Marcus Aurelius 836 Date 161 - 162 AD ; Mint: Rome #numismatics #ancientcoins #romancoins #coin-enthusiasts #coins #romanarchaeology #roman #romanempire #ancientbluesky
290
Miguel Costa @mncgmxpt.bsky.social · 29/05/2025
Rev. SECVRITATI PERPETVAE S C Securitas, draped, seated right on low seat, propping head on right hand and holding sceptre in left hand; in front, altar. #numismatics #ancientcoins #romancoins #coin-enthusiasts #coins #romanarchaeology #roman #romanempire #ancientbluesky
010
Miguel Costa @mncgmxpt.bsky.social · 29/05/2025
Obv. M AVREL ANTONINVS PIVS AVG BRIT Bust of Caracalla, laureate, draped, cuirassed, right. #numismatics #ancientcoins #romancoins #coin-enthusiasts #coins #romanarchaeology #roman #romanempire #ancientbluesky
110
Miguel Costa @mncgmxpt.bsky.social · 29/05/2025
1/3 Sestertius - RIC IV Caracalla 512A Date 210 - 213 AD ; Mint: Rome #numismatics #ancientcoins #romancoins #coin-enthusiasts #coins #romanarchaeology #roman #romanempire #ancientbluesky
150
Miguel Costa @mncgmxpt.bsky.social · 14/05/2025
Roman coin hoard discovered by Romanian metal detectorist is among the country’s largest. archaeologymag.com/2025/05/roma... #ancientbluesky #archaeology #ancienthistory #romanarchaeology #roman #numismatics #ancientcoins #coin-enthusiasts #coins #romancoins #culturalheritage #museums #romanempire
archaeologymag.com
Roman coin hoard discovered by Romanian metal detectorist is among the country’s largest
A Romanian metal detectorist uncovers 1,469 ancient Roman silver coins near Bucharest—one of the largest hoards ever found in Romania.
040
Miguel Costa @mncgmxpt.bsky.social · 30/03/2025
2,200-year-old mysterious pyramid structure filled with coins and weapons found near Dead Sea. The purpose of a mysterious pyramidal structure in the Judaean Desert is unknown, but excavators are finding many well-preserved artifacts there. www.livescience.com/archaeology/...
livescience.com
Mysterious pyramid structure found in Judaean Desert
The purpose of a mysterious pyramidal structure in the Judaean Desert is unknown, but excavators are finding many well-preserved artifacts there.
010
Miguel Costa @mncgmxpt.bsky.social · 13/02/2025
Marcus Antonius: The Loser Who Did Not Write History. new.coinsweekly.com/article-of-t... #ancientbluesky #archaeology #ancienthistory #romanarchaeology #roman #numismatics #ancientcoins #coin-enthusiasts #coins #romancoins #culturalheritage #museums #romanempire
new.coinsweekly.com
Marcus Antonius: The Loser Who Did Not Write History - CoinsWeekly %
Künker’s auction 419 features numismatic rarities from the Roman civil war that followed Caesar’s death. In addition to the Eid Mar denarius, aurei of Marcus Antonius will cross the auction block. We ...
010
Miguel Costa @mncgmxpt.bsky.social · 03/02/2025
Rare Roman and British coin hoard discovered in Netherlands. archaeologymag.com/2025/02/roma... #ancientbluesky #archaeology #ancienthistory #romanarchaeology #roman #numismatics #ancientcoins #coin-enthusiasts #coins #romancoins #culturalheritage #museums #romanempire #metaldetecting
archaeologymag.com
Rare Roman and British coin hoard discovered in Netherlands
Two metal detectorists unearthed an outstanding hoard of 404 Roman and British gold and silver coins in the Dutch municipality of Bunnik
0110
Miguel Costa @mncgmxpt.bsky.social · 02/02/2025
5/5 ... identifying the name of the saint and surrounded by an inscription allusive to India, which by tradition is associated with the evangelising action of that same apostle. #numismatics #coin-enthusiasts #coins #rarecoins #culturalheritage
020
Miguel Costa @mncgmxpt.bsky.social · 02/02/2025
4/5 ... The reverse has a representation of Saint Thomas standing to the left, flanked by two monetary letters ... #numismatics #coin-enthusiasts #coins #rarecoins #culturalheritage
120
Miguel Costa @mncgmxpt.bsky.social · 02/02/2025
3/5 ... The obverse shows the typical representation of the crowned coat of arms of the kingdom, surrounded by an inscription allusive to the name of João III and his position as King of Portugal and the Algarves. ... #numismatics #coin-enthusiasts #coins #rarecoins #culturalheritage
120
Miguel Costa @mncgmxpt.bsky.social · 02/02/2025
2/5 The escudo of Saint Thomas marks the moment when the renaissance aesthetic was used in the metallic specimens in circulation. ... #numismatics #coin-enthusiasts #coins #rarecoins #culturalheritage
120
Miguel Costa @mncgmxpt.bsky.social · 02/02/2025
1/5 Denomination: Escudo de São Tomé, (1000 Reais) Mint: Lisbon Authorit: King João III of Portugal, (1521 - 1557) #numismatics #coin-enthusiasts #coins #rarecoins #culturalheritage
130
Miguel Costa @mncgmxpt.bsky.social · 31/01/2025
Ibero-Roman Coins Denomination: As Mint: SALDUIE - CAESARAUGUSTA, today is the city of Zaragoza, Spain Dating: time of Gaius/Caligula (37AD-41AD) Portrait: Agrippa #numismatics #ancientcoins #romancoins #ibero-romancoins #coin-enthusiasts #coins #romanarchaeology #roman #romanempire #ancientbluesky
0120
Miguel Costa @mncgmxpt.bsky.social · 29/01/2025
What the Second Trump Administration Might Mean for Collectors. new.coinsweekly.com/news-en/what... #numismatics #ancientcoins #romancoins #coin-enthusiasts #coins #romanarchaeology #roman #romanempire #ancientbluesky
new.coinsweekly.com
What the Second Trump Administration Might Mean for Collectors - CoinsWeekly %
What does Donald Trump's return to the White House mean for collectors in the USA? Will the new Administration help “Make Collecting Great Again” or will it be anti-collecting business as usual at the...
011
Miguel Costa @mncgmxpt.bsky.social · 28/01/2025
Excavations at a new Roman site in Faro. One of the biggest surprises was the discovery of part of a beautiful mosaic. www.portugalresident.com/archaeology-... #ancientbluesky #archaeology #ancienthistory #romanarchaeology #roman #romanempire #culturalheritage #museums #history
portugalresident.com
Archaeology: Excavations at a new Roman site in Faro
Archaeology: Excavations at a new Roman site in Faro. One of the biggest surprises was the discovery of part of a beautiful mosaic.
041
Miguel Costa @mncgmxpt.bsky.social · 27/01/2025
Ibero-Roman Coins Denomination: As Mint: CAESAR AUGUSTA, today is the city of Zaragoza, (Spain) Dating: time of Augustus (27 BC - 14 AD) #numismatics #ancientcoins #romancoins #ibero-romancoins #coin-enthusiasts #coins #romanarchaeology #roman #ancientbluesky
150
Miguel Costa @mncgmxpt.bsky.social · 24/01/2025
Ibero-Roman Coins Denomination: Semis Mint: IULIA TRADUCTA, today is the city of Algeciras, (Andalusia - Spain) Dating: time of Augustus (27 BC - 14 AD) #numismatics #ancientcoins #romancoins #ibero-romancoins #coin-enthusiasts #coins #romanarchaeology #roma #romanempire #ancientbluesky
090
Miguel Costa @mncgmxpt.bsky.social · 23/01/2025
Roman strategy game pieces discovered in Hadrianopolis, Turkey. archaeologymag.com/2025/01/roma... #ancientbluesky #archaeology #ancienthistory #romanarchaeology #roman #romanempire #culturalheritage #museums #history
archaeologymag.com
Roman strategy game pieces discovered in Hadrianopolis, Turkey
Excavations conducted in Hadrianopolis, in the Karabük region of Turkey, uncovered two game stones made of bone dating to the 5th century CE
080
Miguel Costa @mncgmxpt.bsky.social · 23/01/2025
IAPN Asks Collectors to Help Protect Roman Coin Collecting. new.coinsweekly.com/news-en/iapn... #numismatics #ancientcoins #romancoins #coin-enthusiasts #coins #romanarchaeology #roman #romanempire #ancientbluesky
new.coinsweekly.com
IAPN Asks Collectors to Help Protect Roman Coin Collecting - CoinsWeekly %
Will Roman coins in general be considered the cultural property of Italy by US Customs unless you can provide extensive proof of ownership? Such concerns are raised by the proposed extension of a Memo...
042
Miguel Costa @mncgmxpt.bsky.social · 23/01/2025
6/6 ... It is part of the exhibition “Farmers and Shepherds of Prehistory - Testimonies of the Sintra Region”, at the S. Miguel de Odrinhas Archaeological Museum. #ancientbluesky #archaeology #prehistory #ancienthistory #history #historyfiles #preroman #ancienteurope #museums #culturalheritage
000
Miguel Costa @mncgmxpt.bsky.social · 23/01/2025
5/6 ... is often engraved on equine (as in this case) or cervid phalanges, certainly representing a female deity. ... #ancientbluesky #archaeology #prehistory #ancienthistory #history #historyfiles #preroman #ancienteurope #museums #culturalheritage
100
Miguel Costa @mncgmxpt.bsky.social · 23/01/2025
4/6 ... This graphic typology, common in the western peninsula during the third millennium BC, ... #ancientbluesky #archaeology #prehistory #ancienthistory #history #historyfiles #preroman #ancienteurope #museums #culturalheritage
100
Miguel Costa @mncgmxpt.bsky.social · 23/01/2025
3/6 ... The front allows you to clearly see the eyes, represented as suns, and the pubis. ... #ancientbluesky #archaeology #prehistory #ancienthistory #history #historyfiles #preroman #ancienteurope #museums #culturalheritage
100
Miguel Costa @mncgmxpt.bsky.social · 23/01/2025
2/6 ... Profusely decorated throughout the back, retaining all the details of what may be a stylized representation of the waving hair and possibly the robes. ... #ancientbluesky #archaeology #prehistory #ancienthistory #history #historyfiles #preroman #ancienteurope #museums #culturalheritage
100
Miguel Costa @mncgmxpt.bsky.social · 23/01/2025
1/6 Votive artifact from the Chalcolithic period (3rd millennium BC), from the prehistoric settlement of Olelas, Almargem do Bispo, Sintra, (Portugal). ... #ancientbluesky #archaeology #prehistory #ancienthistory #history #historyfiles #preroman #ancienteurope #museums #culturalheritage
171
Miguel Costa @mncgmxpt.bsky.social · 22/01/2025
New structures of Lisbon's Roman Theatre unveiled: “How were they 30 centimeters from our feet?” www.publico.pt/2025/01/21/l... #ancientbluesky #archaeology #ancienthistory #romanarchaeology #roman #romanempire #culturalheritage #museums #history
publico.pt
Desvendadas novas estruturas do Teatro Romano de Lisboa: “Como é que estavam a 30 centímetros dos nossos pés?”
Escavações arqueológicas num edifício da Rua de São Mamede deixaram à vista a continuação do teatro romano. Uma das descobertas foi o muro que separa o palco da área reservada aos espectadores.
010
Miguel Costa @mncgmxpt.bsky.social · 22/01/2025
New structures from Lisbon's Roman Theatre discovered at a depth of 30 centimeters. www.nit.pt/fora-de-casa... #ancientbluesky #archaeology #ancienthistory #romanarchaeology #roman #romanempire #culturalheritage #museums #history
nit.pt
Descobertas novas estruturas do Teatro Romano de Lisboa a 30 centímetros de profundidade
Durante as escavações realizadas em dezembro de 2024, foram desvendadas construções em excelentes condições de conservação.
120
Miguel Costa @mncgmxpt.bsky.social · 22/01/2025
6/6 ... with arms forming quadrants in which the motto of the monarchy is inscribed – «in this sign thou shalt conquer» – and the date of minting, 1562. #coins #numismatics #coin-enthusiasts #coins #rarecoins #culturalheritage
000
Miguel Costa @mncgmxpt.bsky.social · 22/01/2025
5/6 ... Reusing the type present in other coins, the reverse bears the representation of the Cross of the Order of Christ, ... #coins #numismatics #coin-enthusiasts #coins #rarecoins #culturalheritage
100
Miguel Costa @mncgmxpt.bsky.social · 22/01/2025
4/6 ... In the usual representation of the coat of arms of the kingdom on the obverse of the coin, the name of King Sebastião, on the rim, is included along with reference to his kingship of Portugal. ... #coins #numismatics #coin-enthusiasts #coins #rarecoins #culturalheritage
100
Miguel Costa @mncgmxpt.bsky.social · 22/01/2025
3/6 ... The adoption of this process led to the minting of a technically more perfect coin, coupled with a keen aesthetic sense. ... #coins #numismatics #coin-enthusiasts #coins #rarecoins #culturalheritage
100
Miguel Costa @mncgmxpt.bsky.social · 22/01/2025
2/6 The engenhoso (ingenious) corresponds to the first coin minted in Portugal by mechanical process, a technique created by João Gonçalves in order to avoid trimming the gold coin. ... #coins #numismatics #coin-enthusiasts #coins #rarecoins #culturalheritage
100
Miguel Costa @mncgmxpt.bsky.social · 22/01/2025
1/6 Denomination: Engenhoso, (500 Reais) Mint: Lisbon Authorit: King Sebastião I of Portugal, (1557 - 1578) #coins #numismatics #coin-enthusiasts #coins #rarecoins #culturalheritage
100
Miguel Costa @mncgmxpt.bsky.social · 19/01/2025
Pompeii excavation reveals spectacular 2,000-year-old private thermal spa and bathhouse. archaeologymag.com/2025/01/priv... #ancientbluesky #archaeology #ancienthistory #romanarchaeology #roman #romanempire #culturalheritage #museums #history
archaeologymag.com
Pompeii excavation reveals spectacular 2,000-year-old private thermal spa and bathhouse
Archaeologists have unearthed one of the largest, best-preserved private thermal bath complexes ever found in Pompeii.
080