and replaced by small-scale Plattenbau houses. After 1990, many buildings were thoroughly refurbished after having fallen into dereliction during GDR times. Nevertheless, a relatively large share of ruined historic buildings remains characteristic for Gotha (in comparison to neighbouring cities like Eisenach, Erfurt or Weimar), especially within the historic new town and the 19th century belt around the city centre. The government sometimes failed to conserve historic buildings, for example the was demolished in 2007, as was the in 2011 (although the latter has now being reconstructed externally). The was saved in 2006, and the Prinzenpalais was restored in 2017 although the adjacent Kavaliershaus was demolished. Sights and architectural heritage Churches The main Protestant church St. Margarethen at Neumarkt was built between 1494 and 1543 in late-Gothic style. The Protestant church St. Salvator at Klosterplatz is a former monastery of the Augustinians, built around 1300 in Gothic style and dissolved in 1525. The ducal chapel inside Friedenstein Castle is located at the north-eastern corner and was designed in 1697. The Protestant Friedrichskirche at Erfurter Landstraße was built between 1712 and 1715 in Baroque style. The Protestant church St. Helena at Siebleben district was built between 1818 and 1827 in Neo-Classical style. The Catholic parish church St. Bonifatius at Moßlerstraße was built in 1855 in Neo-Romanesque style. Castles and palaces The former residence of the Saxe-Gotha dukes is Friedenstein Castle, one of the largest late-Renaissance/early-Baroque styled castles in Germany. It consists of three wings in U-form with two towers at their ends and was built between 1643 1654. The Schloss Friedrichsthal at Friedrichstraße is the former ducal summer residence, built between 1707 and 1711 in French Baroque style. The Winterpalais at Friedrichstraße is the former ducal winter residence, built in 1822 in neo-classical style. The Orangerie at Friedrichstraße consists of two symmetric orangery houses and a Baroque park in between, built between 1747 and 1774. The Prinzenpalais at Mozartstraße was the ducal guesthouse, built in 1776. The Marstall at Parkallee was the ducal stables, built in 1847. The Schloss Mönchhof at Siebleben district was a ducal summer residence, built in the late 18th century. Other sights The town hall at Hauptmarkt was built as a bourse between 1566 and 1574 in Renaissance style. It has been in use as town hall since 1665. There are some Renaissance patricians' houses around Hauptmarkt and Brühl, showing the city's wealth through the 15th and 16th