Anstaltskirche Sonnenstein, Church building in Sonnenstein, Germany

Anstaltskirche Sonnenstein is a ruined neo-Gothic basilica of sandstone, built 1900–1902, with a high central nave, two lower side aisles and a tower set in the southern corner. The west front has an entrance porch with its own hipped roof; the side aisles end in hipped roofs marking the sacristy and cloakroom. The interior, now empty, once held Art Nouveau ceiling and wall paintings by court painter Schulze of Dresden.

Built in the early 1900s, this church replaced an earlier chapel from 1817 that had served the psychiatric hospital complex. The building's survival is linked to its use as storage during the post-war period until 1991, which protected it from demolition.

The name Anstaltskirche refers to the church's role as the institution's church for the Sonnenstein sanatorium, which had 932 Protestant members when the building opened in 1902. The church was closed by state decree in 1939 and the congregation dissolved in spring 1940. In the 1970s the Protestant church was refused ownership and instead built the Kirchgemeindezentrum Pirna-Sonnenstein.

The church is a ruin and cannot be visited inside; it stands on the Sonnenstein grounds in Pirna and is only viewed from outside. There is no realistic prospect of restoration or reuse at present.

The walls are built from different types of sandstone that have developed distinct colors and textures through decades of natural weathering. These color variations tell a subtle story of how the building has aged and changed over time.