Euphrasius' Basilica is the most valuable cultural monument in Porec. It was built on the remains of an earlier tri-naval basilica, in the first half of the 6th century, during the period of Bishop Euphrasius, whose name it bears. The Native Museum of Porec building is situated in a Baroque palace, Sincic, from the 18th century. On the ground floor there is a collection of stone monuments with Roman scriptures, and an archaeological collection of prehistoric ceramic works. The Norther Tower was built in the 15 century. Today the edge is still partly preserved. Located at the beginning of the central street, Decumanus, at the entrance of the heart of the old city, the Pentagonal Tower was erected in the mid 15th century in Gothic style, with a relief of a Venetian lion on the facade. The Great Temple is the remains of an ancient temple from the beginning of the 1st century.