The Prince of Wales is visiting Transylvania, the wooded region in north west Romania where he owns several properties.
Charles met President Klaus Iohannis in Bucharest on Sunday before travelling to the remote village of Valea Zalanului where he owns a country retreat.
Mr Iohannis and Charles discussed the situation in neighbouring Ukraine and rural traditions that have been preserved in some parts of Romania, the presidential press office said.
The Prince, who was seen Monday in Valea Zalanului, usually stays several days in Transylvania. The British embassy does not comment about his visits, due to their private nature.
Charles is enamoured by the countryside and wildlife in Romania, which he has been visiting since 1998.
Mr Iohannis was mayor of the Transylvanian city of Sibiu until he became president in December.