Stone Cleaning
- Posted by Basilica Staff
- On December 13, 2025
- 0 Comments
The Basilica’s interior is faced with 4-inch-thick Mankato limestone. Throughout 2025, conservation crews cleaned the ambulatories in the church. The cleaning material is applied to the surface and once cured, peeled away, extracting embedded soot and particulate deposits that have accumulated over the past century.
