Construction of the Yeni Valide mosque in Üsküdar began in 1708 and was completed in 1710. It was built for sultan Ahmed III in honour of his mother Emetullah Râbi'a Gülnûş Sultan. The complex consists of an imaret (hospice), arasta, primary school, the tomb of Emetullah Râbi'a Gülnûş Sultan, a courtyard shadirvan (fountain), a muvakkithane (clock tower) and offices.
The building is typical of the Classical Ottoman period and of the 'Sinan School' of Ottoman religious architecture. The main part of the building is square-shaped and covered with a flattened main dome and four half domes. The mosque has two minarets with two balconies each. Calligraphy inside the mosque is the work of Hezarfen Mehmet Efendi.
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.