The exhibition "Experience Industrial Culture - Innovative Thuringia since 1800" in Pößneck, Germany includes Anchor Stone building sets (Anker Steinbaukasten) that were first developed in Rudolstadt in the 1880s and are the first building toy system in the world. As part of the program, the famous Dresden church, Frauenkirche, was built from Anchor Stone blocks using more than 2000 stones.