A rare papal bull of the 15th-cent. antipope Benedict XIII was unearthed by archaeologists at the Grodno Castle, South-West Poland.
Latest laser technology was used to uncover the faded frescoes in the Catacombs of St Domitilla in Rome, which are dated to be 1600 years old and were discovered first in 16th century.
Archaeologists excavating the site of the Great Basilica in Plovdiv, South Bulgaria, revealed colourful mosaics and murals showing St Peter. The decorations are dated to 13th-14th century AD.