The Belvedere on the Pfingstberg is a palace in the northern part of the New Garden in Potsdam, atop Pfingstberg mountain. It was commissioned by Friedrich Wilhelm IV and is only one part of an originally substantially more extensive building project. The twin-towered building was modeled on of Italian Renaissance architecture, and it was built between 1847 and 1863 with an interruption from 1852 to 1860. From sketches of from the king, the architects Ludwig Persius, Friedrich August Stüler and Ludwig Ferdinand Hessian drew up details plans. The garden architect Peter Joseph Lenné was responsible for the design of the grounds.
The building fell into disrepair, but was repaired between 1988 and 2005 by a group of local residents. Today, the Belvedere is open for tourists.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.