Two generations later, Count György Károlyi began substantial renovations in 1832, turning the building into its modern neo-classical style.

[1] Beginning in 1835, construction was overseen by architect Mihály Pollack, and the renovated building was officially opened in 1841.

Later in the 19th century, architect Miklós Ybl carried out further restoration and expansion, including the construction of a greenhouse, the fireplaces and likely the decorative design of the Chapel.

Between 1996 and 2000, two years before they moved out, the palace's historic reconstruction began, which served the three basic activities of the Petőfi Museum: scientific collecting and processing work, the creation of exhibitions and the organization of cultural events.

The remains of the stone cellar and food storage of a Turkish house, part of a 13th century village, as well as 23 graves from the 11th-12th century cemetery, and the modern remains of the baroque palace that once stood there were found.