Alaca Imaret Mosque (Turkish: Alaca İmaret Camii) or Ishak Pasha Mosque (Greek: Αλατζά Ιμαρέτ), literally the "colourful mosque", is a 15th-century Ottoman mosque in Thessaloniki, Greece.

[1] It was built by order of Ishak Pasha in 1484 or 1487.

[1] It consists of a mosque with an imaret (public charity kitchen).

The mosque has a reverse T plan common to early Ottoman architecture, the prayer hall is covered by two large domes, it has a portico covered by five smaller domes.

It had one minaret, which was destroyed after 1912, after Thessaloniki was conquered by the Greek Army and became part of the modern Greek state.