Piran's three walls were built in response to the city's expansion.

[1] At the end of the 13th century, when Piran came under Venetian rule, the town grew further and in response the second wall was built.

In the final phases of expansion between 1470 and 1538, the third fortification wall was built to protect the peninsula during construction.

Its northern part is accessible while the southern wall's floors and stairs are missing or are under reconstruction.

A small portion of the third wall is next to the rectory, facing north.