3D modelling of heritage monuments has increased significantly due to advances in laser scanners, 3D modelling software and computers. The main approaches today are interactive and automatic photogrammetry, terrestrial laser ranging and image rendering. The authors discuss each approach, pointing out its advantages and disadvantages. They then present their own approach, which combines image-based, range-based modelling and image-based rendering. Modelling of the Abbey of Pomposa in Italy is presented as an example.