Saint Jacques-sur-Coudenberg or Sint-Jacob-op-Koudenberg is a neoclassical church located in the historic square of Place Royale in central Brussels, Belgium.HistoryThe medieval abbey church that originally stood on this location was demolished by command of Charles Alexander of Lorraine during his expansive urban planning projects, despite having escaped the great fire of 1731 that destroyed the nearby Coudenberg Palace. The new church was built in line with rue Montagne de la Cour/Hofberg on its present location at the Place Royale. Construction of the facade was started by architect Gilles-Barnabé Guimard after the designs of Jean-Benoît-Vincent Barré (1775). The first stone was solemnly laid by Charles Alexander of Lorraine on February 12, 1776. The portico was finished in 1780. The nave, transept, choir and sacristy were built under supervision of Louis Montoyer in the years 1785-1786. After the consecration of the building it was in use as abbey- and parishchurch at the same time. Moreover, it was the official church of the court of the Governors of the Habsburg Netherlands. The present building was designed to serve as the Church of the Abbey of Saint-Jacques on the Coudenberg and therefore has a deep extended choir with place for choir stalls for the monks.