The old Venetian port of Chania, The first thing every visitor notices at the old Venetian port of Chania, is an old building, one of the first Turkish buildings of the island, the Mosque of Hasan Kucuk or Yali Tzamisi. The mosque was built in honor of Küçük Hassan Pasha, the first Turkish military commander of Chania, while the Yali Tzamisi name is interpreted as "mosque of the sea".

The building is an example of Islamic architecture Renaissance designed form an Armenian architect, dating from the second half of the 17th century. The mosque operated as Muslim church until 1923. It is a cubic building covered by a large dome supported by four stone arches, while the west and north side is surrounded by an arcade roofed with seven small domes. In the southwest corner there was a minaret from which saved only the base.

Today the building operates as an exhibition for cultural events and visual art exhibitions.