Alaca Imaret Mosque or Ishak Pasha Mosque (literally the 'colourful mosque') was built by order of Ishak Pasha in 1484 or 1487. It consists of a mosque with an imaret (public charity kitchen). The mosque and imaret are not in use anymore. 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 liberated by the Greek Army and became part of the modern Greek state.
References:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.