无忧宫（Schloss Sanssouci），源自于法文的sans（无）-souci（忧虑）。位于德国波茨坦，为勃兰登堡地区波茨坦最著名的霍亨索伦家族（Hohenzollern）宫殿。西元1745年至1747年根据普鲁士国王腓特烈二世的草图，设计洛可可式小型夏日宫殿。这个设计并由建筑师乔治·温彻斯劳斯·冯·克诺伯斯多夫（Georg Wenzeslaus von Knobelsdorff）授权。

到西元1840年至1842年，普鲁士国王腓特烈·威廉四世将建筑物规模再作扩大，并将两边侧殿延伸。设计者为建筑师路德因·佩修斯（Ludwig Persius），东侧建筑由建筑师费迪南·冯·阿尔宁（Ferdinand von Arnim）授权监工。

Sanssouci is the former summer palace of Frederick the Great, King of Prussia, in Potsdam, near Berlin. It is often counted among the German rivals of Versailles. While Sanssouci is in the more intimate Rococo style and is far smaller than its French Baroque counterpart, it too is notable for the numerous temples and follies in the park. The palace was designed/built by Georg Wenzeslaus von Knobelsdorff between 1745 and 1747 to fulfill King Frederick's need for a private residence where he could relax away from the pomp and ceremony of the Berlin court. The palace's name emphasises this; it is a French phrase (sans souci), which translates as "without concerns", meaning "without worries" or "carefree", symbolising that the palace was a place for relaxation rather than a seat of power.