Since 2019 Estonian Open Air Museum has been organizing a window restoration campaign Look at the old window! In May 2020, a thorough online information day took place; in 2021, various events and trainings were held in a dozen locations across Estonia. For three years, we've created videos, articles, and tutorials to help restore old windows. The campaign ended in 2021.
You can find our useful instructional materials for restoring old windows here.