Pelişor Castle (Romanian: Castelul Pelişor) is a castle in Sinaia, Romania, part of the same complex as the larger castle of Peleş. It was built in 1899–1902 by order of King Carol I, as the residence for his nephew and heir, the future King Ferdinand (son of Carol's brother Leopold von Hohenzollern) and Ferdinand's consort Queen Marie.
Pelişor was designed by the Czech architect Karel Liman in the Art Nouveau style; the furniture and the interior decorations were designed mostly by the Viennese Bernhard Ludwig. There are several chambers, working cabinets, a chapel, and "the golden room". Queen Marie herself, an accomplished artist, made many of the artistic decisions about the design of the palace, and participated in its decoration, including as a painter.
Queen Marie considered Art Nouveau a weapon against sterile historicism, creating a personal style combining Art-Nouveau elements with Byzantine and Celtic elements. The hall of honor is very simple with the walls covered with oak-timber and a glass ceiling.