The small half-timbered house was firmly connected on the north side with that of the then master carpenter Klockenhoff. It was accessible through a small alley between the house Klockenhoff and Reccius. The prayer room was 10 x 6 m large and was already mentioned in the original cadastre of 1821. Moses Seligmann who worked as a rabbi and teacher is also mentioned. Heinrich Klockenhoff acquired the annex in 1908 for 800 Reichsmark and integrated it into his estate. His son Heinrich Jr. sold the entire property to Röllecke in 1962.