Trauttmannsdorfský palác, Renaissance palace in Mariánské náměstí, Czech Republic.

The Trauttmannsdorfský Palace stands on an irregular plan shaped by Mariánské náměstí, Husova and Seminářská streets. Its main entrance on Mariánské náměstí has a Baroque edicule portal with the 17th-century Trattmansdorff coat of arms; the courtyard galleries with stone corbels are Neoclassical.

A Gothic courtyard house first recorded in 1400, whose cellars survive, stood on this site and became the base of a palace rebuilt in the Renaissance. A major reconstruction followed around 1700, probably designed by Jan Blažej Santini-Aichel, and Alexandr Hellmich later gave the palace its Neoclassical form and extent. In 1894 it was converted into a rental apartment building.

The palace takes its name from a family that held influence in Prague for generations, reflecting the connections between German and Czech nobility in the city. The Renaissance details on the facade tell of an era when such residences displayed wealth and social standing.

The palace sits in the heart of the Old Town near the public square and is easily reached on foot from many historical sites. The area is well served by public transportation and offers clear landmarks for visitors to navigate.

The palace appears briefly in the TV series 30 Cases of Major Zeman, in the episode Krádež sladkého "I", as the Central Medicine Warehouse; only the entrance portal and passage are shown, for a few seconds. It also appears in the third episode of Dobrodružství kriminalistiky, Bertillonáž.