Kaiserdom St. Bartholomäus
In 1343, , cantor of Frankfurt Cathedral, received land in front of the Bockenheimer Tor of the Staufenmauer to build a hospice centre for the sick and poor. Two years later Frosch secured a foundation that guaranteed the financing of the hospital, and expanded it in 1354 with a patrician convent dedicated to Saints Catherine and Barbara, organized on the Rule of the Teutonic Knights for Women.