Sankt Hans och Sankt Pers kyrkoruiner, Medieval church ruins in Visby, Sweden.

Sankt Hans och Sankt Pers kyrkoruiner are the remains of two connected medieval churches standing in central Visby, with stone walls and structural elements dating from the 13th century. The ruins display architectural features such as arches, pillars, and foundations that reflect their age and original design.

The oldest Sankt Hans was probably Gotland's first stone church, built around 1060 on a former pagan sacrificial site. Sankt Per was built after 1161 as the German parish church, replacing the abandoned wooden Allhelgonakyrkan. In 1533/1534 the governor Henrik Rosencrantz had the towers demolished for defensive reasons, and the churches were largely torn down by the 17th century.

The name Sankt Hans refers to the evangelist John and Sankt Per to the apostle Peter. In the 13th century the two parishes kept separate burial grounds: Germans were buried west of the churches, Gotlanders in the more prestigious eastern part. The Tailors' guild house stood directly south of Sankt Per, the church of the 'common people'.

The ruins stand in central Visby, a short walk from the cathedral and the main square. The site is open and can be visited at any time of day; there are no barriers or entrance fees. The ground is uneven, with loose stones and low wall remnants, so watch your step. The adjacent Lythbergska huset, built from stone taken from the churches, is visible from the ruins.

The early demolition of the churches left large numbers of medieval gravestones unused, giving Visby the largest preserved collection of medieval gravestones in Europe. Among finds from Saint Hans is the Hailgairs häll, a rune-inscribed stone dated to about 1070.