Rietveld Schröder House is one of the most representative work of the Dutch De Stijl movement. The house represents Mrs Schröder’s pursuit of a modern, open lifestyle. Moreover, it is also the first batch of restored modern architectural heritage, which is a milestone for Dutch and even worldwide architectural protection. Bertus Mulder is the leading architect responsible for the restoration. This article puts him in the context of the development of modern Dutch architectural protection theory and examines his guiding ideology, choices, results, and omissions, as well as the role of the Schröder family. Mulder focused on the restoration of the initial abstract space of the restored home, and this resulted in a drastic repair of the color a...