Holy Cross Church, Liège, Catholic collegiate church in Place Verte, Belgium.

Holy Cross Church is a collegiate church in Liège, built mainly in Gothic style from the 13th to 15th centuries, with a Romanesque-Gothic west choir (c. 1200–1220) topped by an octagonal bell tower. It measures 57 m long, 25 m wide and 17 m high under the vault. The east choir dates from 1255, the transept and first two nave bays from 1283–1287, the last two bays from 1332, and 15th-century chapels sit between the buttresses.

Bishop Notger founded the church between 976 and 986 as a center for secular canons to conduct their religious duties. A community of these clerics remained in place until the Liège Revolution ended their role in 1797.

The church keeps the Key of Saint Hubert, once held in the treasury of Saint-Pierre collegiate church in Liège. The building stands at the corner of Rue Sainte-Croix and Rue Haute-Sauvenière, and its name recalls the Holy Cross. Since 1802 it has served as a parish church.

The church stands at the corner of Rue Sainte-Croix and Rue Haute-Sauvenière, near Place Verte. It has been closed to the public since 2005 because of its dilapidated state, so the interior cannot be visited. Restoration work began with a tower crane installed on 3 November 2020, and scaffolding and a temporary roof were planned through October 2021.

The Key of Saint Hubert kept here came from the treasury of Saint-Pierre collegiate church, not the other way round. The church has been closed to the public since 2005 because of its dilapidated state, and in October 2013 it was added to the World Monuments Fund's list of 67 endangered monuments.