Green School, or 'Our Lady of Deinsbeke Institute' is a Neo-Gothic building in the Belgian city of Zottegem. The history of this college dates back to the mid-nineteenth century.

To address the severe lack of sound and affordable education in the city, August De Rouck founded a new school in 1862. The Catholic industrialist and large landowner from Ghent initially used the existing buildings that had previously served as business premises. In 1868, he donated the properties to the nearby diocese. The following year, the school building was expanded with a teacher's residence.

In the period 1881–1883, all the existing buildings, including the teacher's residence, were demolished. In 1883, a completely new school in the Neo-Gothic style was erected. Once again, De Rouck bore part of the costs.