Paterskerk, Gothic church ruin in Tienen, Belgium.

Paterskerk is a roofless Gothic church ruin in Tienen, built of pale grey and light beige stone with sections of exposed reddish brick. Its flat facade without a bell tower holds three pointed-arch windows with stone tracery; thick rectangular pillars and a single pointed arch survive on the left, and a dark metal gate spans a low wall at the base.

This building was founded in 1245 as one of Belgium's earliest beguinage churches and later passed to Dominican monks who modified its use. A major fire in 1976 destroyed the roof and led to its protection as a heritage monument.

Locals still call the beguinage church the Paterskerk, after the Dominican fathers who bought it in 1843 and turned it into a monastery. The restored ruin is now a favourite backdrop for wedding photos, and the K3 music video "Yeke yeke" was partly filmed here.

This site is freely accessible and located in a public park near Tienen's city center with informational signs about the architecture. Visitors can view the ruins from multiple angles thanks to the open-air layout.

The fire of 22 September 1976 was not caused by roofing work; it largely destroyed the church, and the ruin was restored and laid out as a walking park in 1997. The site is now regularly used for wedding photographs, and the K3 girl group filmed part of the music video for "Yeke yeke" inside the ruins.