1501 was also the year for which an outbreak of the plague (probably the bubonic plague) is recorded in the Swabian chronicle Annalium Suevicorum by Eberhard Karls University of Tübingen professor Martin Grusius, published 1596. It is not known how many of Pforzheim's citizens died in that year, but there are reports of 500 deceased in the close-by city of Calw and about 4000 in Stuttgart, which accounted for approximately one quarter to one half of the populations of those towns. Outbreaks of the disease were reported for many places in southwestern Germany, Bohemia, the Alsace region in nowadays France, Switzerland, and Italy. Common graves with massive numbers of human bones at the cemetery of St. Michael Church and the cemetery on the estate of the Dominican order near nowadays Waisenhausplatz found during the last century may indicate that hundreds of citizens became the victims of the plague. There are indications that a fraternity for taking care of the sick and removing the bodies of the deceased from houses was formed in 1501, whose members later on stayed together and became known as the choral society Singergesellschaft, which is still active today as the Loebliche Singergesellschaft of 1501. (They are probably one of the oldest clubs in Europe).
