The Leineschloss, situated on the Leine in Hanover, Germany, is the former residence of the Hanoverian dukes, electors and kings. Currently it is the seat of the Landtag of Lower Saxony.
The first building on the site was a Franciscan friary, constructed in about 1300, which was abandoned in 1533 after the Protestant Reformation. In 1636, George, Duke of Brunswick-Lüneburg, began converting the monastery into a rather small late renaissance palace as his residence as ruler of the Principality of Calenberg. The former monastery church served as a castle church and royal burial place. His son, Elector Ernest Augustus, had it enlarged and modernized and added a theatre in the late 17th century. The Principality was elevated to the Electorate of Hanover in 1692. In 1742 the north-west wing was renewed.
Wikipedia https://en.wikipedia.org/wiki/Leineschloss
More information at landtag-niedersachsen.de http://www.landtag-niedersachsen.de/leineschloss_geschichte/
Address Hinrich-Wilhelm-Kopf-Platz 1, 30159 Hannover, Germany
Coordinates 52°22'13.674" N 9°43'59.193" E
