Orban, also known as Urban (Hungarian: Orbán; died 1453), was an iron founder and engineer from Brassó, Transylvania, in the Kingdom of Hungary (today Brașov, Romania), who cast large-calibre artillery for the siege of Constantinople by the Ottomans in 1453. Orban was Hungarian, according to most modern authors, while some scholars also mention his potential German ancestry. Alternative theories suggest he had Wallachian roots. Laonikos Chalkokondyles used the term Dacian to describe him.
https://en.wikipedia.org/wiki/Orban
Orban, also known as Urban (Hungarian: Orbán; died 1453), was an iron founder and engineer from Brassó, Transylvania, in the Kingdom of Hungary (today Brașov, Romania), who cast large-calibre artillery for the siege of Constantinople by the Ottomans in 1453. Orban was Hungarian, according to most modern authors, while some scholars also mention his potential German ancestry. Alternative theories suggest he had Wallachian roots. Laonikos Chalkokondyles used the term Dacian to describe him.
