De Roos

De Roos is a seven-story stone mill with traditional Dutch grinding machinery located in central Delft. The building operates weekly for grain processing and demonstrates how such structures continue to function in the modern city.

A wooden mill occupied this site as early as 1352 before the current stone structure was built in 1679. It stands as the sole survivor among the many mills that once operated throughout Delft.

The mill's name refers to its red brick construction and serves as a working symbol of traditional craft for visitors to observe. People come to see how old milling techniques are still practiced and how such places remain part of the city's daily life.

The mill is open to visitors on several days each week with regular afternoon hours. You should check ahead for which specific activities are scheduled on particular days to get the most from your visit.

During railway construction in 2012, engineers lifted the entire mill one meter high and then lowered it onto a newly built train tunnel below. This was an extraordinary engineering feat performed to preserve the historic structure.