Hof van Belsele is a castle estate and former priest's retirement home in Sint-Niklaas, Belgium, encompassing approximately 41,335 square meters. Acquired in the 18th century by Bishop Maximiliaan van der Noot and partially rebuilt in 1754, the property underwent major renovation and expansion in 1904-1906 under architect Stephan Mortier. The complex includes a neo-traditional castle, former coach house, gardener's cottage, and a neo-Gothic chapel consecrated in 1906. The extensive landscaped park features monuments, gardens, a pond, decorative structures including a gazebo and iron bridge, and a grotto with religious imagery. From 1906, the Sisters of the Holy Angels from Lokeren cared for retired priests at the estate. Formally designated as protected architectural heritage since June 2023.