Ulnersche Kapelle, Cultural heritage monument in Weinheim, Germany

The Ulnersche Kapelle is a stone structure at the heart of Weinheim's old town featuring an octagonal roof tower as its distinctive element. A residential and commercial building constructed in front of it has obscured its visibility from the marketplace since the early 1900s.

Construction of the stone chapel took place from 1350 to 1367, replacing an earlier wooden building and including a hospital wing. The Ulner von Dieburg family later became instrumental in its development, expanding its endowment and enhancing its facilities throughout the 15th century.

The chapel is dedicated to Saint Abbot William, to whom it was consecrated in 1878 after a renovation. Its endowment was separated from the old foundation in 1905 and placed in the "Ulner Fonds", a church foundation administered by the St. Laurentius parish; the secular part, the "Freiherr von Ulner'sche Stiftung", has been managed by the Rhein-Neckar-Kreis since 1979. Since the 2012 sale and deconsecration, chapel and former almshouse serve as a private event centre.

The chapel now operates as a private event venue and is not regularly open for casual visiting. To experience the interior, visitors should look for scheduled public events or inquire about special viewing arrangements in advance.

Despite its central location at the marketplace, the chapel remains largely hidden from view due to the building constructed in front of it decades ago. This creates an unexpected discovery moment for visitors who realize such an important historical structure lies just beyond the visible streetscape.