Muzeum Ziemiaństwa w Dobrzycy, Museum in Dobrzyca, Poland.

The Museum of the Landed Gentry in Dobrzyca operates within an 18th-century neoclassical palace surrounded by a 10.5-hectare English-style park containing over 30 natural monuments including Europe's largest London plane tree.

The museum was founded on 1 December 1988 as the Museum of Freemasonry, a branch of the National Museum in Poznań, reflecting the palace's supposed Masonic links. It was closed on 31 December 1995, and in January 1996 the Kalisz voivode established an independent Museum of the Palace and Park Complex. In 2009 it took its current name, and since 2019 the complex has been a Monument of History.

The museum's name refers to the Polish landed gentry (ziemiaństwo), whose heritage it has documented since 2009. It publishes the annual "Dobrzyckie Studia Ziemiańskie" and hosts "Spotkania z klasyką" concerts and open-air painting sessions. The earlier Masonic profile reflected the supposed Masonic symbolism of the palace.

Open daily from April 1 to October 31 except Mondays, the museum offers free admission with guided tours available for 25-30 złoty, operating from 10:00 to 17:00 Tuesday through Friday and until 18:00 on Saturdays.

The palace's L-shaped plan and Augustyn Gorzeński's Masonic links led to the founding of the Museum of Freemasonry here in 1988. Conservators later uncovered original polychromies by Antoni Smuglewicz and Robert Stankiewicz, and the restoration won the Sybilla 2004 first prize.