Even the nickname Grimm (same meaning in English and in German) was apparently so common that it even was mentioned in official documents, such as in a parchment from the year 1330[1] .

The document, sealed by the Princess Abbess of Fraumünster, the abbot of the Einsiedeln Abbey and the Propst von Zürich (Grossmünster), listed among others the names of Heinr.

Johann Pilgrim, der Grimme left over the tower together with residential buildings to the hospital for accommodation and nursing sisters, and so a monastic community was established.

The so-called Zum Langen Keller (Rindermarkt 26, 8001 Zürich) residential building was attached to the northwestern side of the tower even before 1300.

In the late 19th century, the property was in private hands and was once more widely rebuilt: The clock and bell were removed, on the south and north side new windows and a new roof were installed.