Delftse Molen or Molen de Roos Windmill laser scanning data, point clouds are acquired for BSc Thesis of Joppe Roebroeks The data includes generated mesh models from the point clouds as well. Merging interior and exterior laser scanning point clouds of the historical windmill, completing the missing parts from airborne laser scanning data and trying different mesh generation methods for full 3D windmill model generation in order to be able to perform virtual visits in the future. Background: “Molen de Roos” a mill located in Delft, a city in the western part of the Netherlands, is only one of the many old buildings in the Netherlands. More and more these buildings are degrading with respect to integrity, suffering from their age. Therefore it would be desired to look for ways to scan the building in order to find damaged areas. They can then be repaired before the building is being