Pension Třemšín, Guest house at Třemšín mountain base, Rožmitál pod Třemšínem, Czech Republic.

Pension Třemšín is a building near the walking path to Třemšín mountain, an 827-meter peak in the southern Brdy range. The house has a simple appearance and sits strategically along the hiking routes of the area.

The pension was built in 1929 for the Rožmitál hotelier Jan Antonín Muchka, who ran the Panský dům on the square. The architect and builder Jan Kolář designed it, with later additions by Karel Houra of Sušice and the Rožmitál builder Jiřík. It opened on 1 May 1929 and was later seized by the Germans, who renamed it Viktoria in 1941.

Regular guests nicknamed the pension "Brdský ráj" (Brdy Paradise). Its owner Emil Muchka had menu cards drawn in pencil by the academic painter Vladislav Hřímalý for Cardinal Karel Kašpar's visit; the drawings of corners of the town and its surroundings survive. Guests included František X. Šalda, poet Ladislav Stehlík and radio reporter Josef Laufer, who was best man at Muchka's wedding.

The building is currently in a state needing repairs and does not offer accommodation services for visitors. Walkers mainly use the location as an orientation point on their route through the Brdy mountains.

The pension was renamed "Viktoria" in 1941 by the German occupiers, who used it as a recovery home for wounded soldiers and later for the Hitlerjugend. Its owner Emil Muchka secretly supported the resistance group of František Lízl and Jaroslav Pompl, who hid escaped Soviet soldiers in the Brdy forests.