The group of religious monuments in Porec, where Christianity was established as early as the 4th century, constitutes the most complete surviving complex of its type. The basilica, atrium, baptistery and episcopal palace are outstanding examples of religious architecture, while the basilica itself combines classical and Byzantine elements in an exceptional manner.

The Committee decided to inscribe this property on the basis of criteria (ii), (iii) and (iv), considering that the Episcopal complex of the Euphrasian Basilica in the historic centre of Porec is an outstanding example of an early Christian episcopal ensemble that is exceptional by virtue of its completeness and its unique Basilican cathedral.