Zámeček Ernestinum, Medieval castle and cultural monument in Příbram, Czech Republic.

Zámeček Ernestinum is a former archbishop's residence in Příbram, built as a stone castle in the 14th century on the site of a 13th-century wooden fortress and rebuilt in Baroque style after 1670. A Gothic bay window survives on the east wall, a remnant of the castle chapel's presbytery, and a statue of Arnošt of Pardubice by Ivar Kodym stands at the southeast corner.

A wooden fortress from the 13th century preceded the stone castle built in the 14th century on the same site. The building takes its name from Arnošt of Pardubice, first Archbishop of Prague, whose statue by sculptor Ivar Kodym stands on the southeast corner. After 1670 Archbishop Matouš Ferdinand Sobek of Bílenberk had it repaired, enlarged and rebuilt as a Baroque chateau.

The František Drtikol Gallery inside the building showcases permanent exhibitions of works by this notable Czech photographer and painter from Příbram. Visitors can see how this local artist expressed himself through both photography and painting during his career.

The building stands in Příbram I, with the World War I memorial by Václav Šára, designed by Jan Kotěra and Jan Štursa, in its immediate vicinity. The Gothic bay window survives on the east wall, a remnant of the castle chapel's presbytery. The château was renovated in the 1970s and 1980s and now houses the František Drtikol Gallery, the Museum of the Third Resistance, the town information centre and offices.

The building became the seat of a school after 1849, when silver mining expanded in Příbram; from 1894 it housed the Mining Academy, which moved to Ostrava in 1946. The vacated rooms were then handed to the town for municipal use.