The diaries are unique. They prove the close cooperation between Catholics and Jews since the introduction of the Rentenmark. With the Nazi seizure of power, the decline of the Jewish community becomes comprehensible here. The books reveal individuals of whom there is no record in other sources. The receipts and expenditures of both communities can be traced, from church collections to the purchase of palm branches for the Jewish Feast of Tabernacles. Three journals have been preserved. They had to be submitted annually to the tax office. There is no evidence of a state-imposed abandonment of this practice under Nazism. The crises of the 1920s show the declining financial strength of the Lorsch Jews. In 1931 and 1932, some of them fell behind with their payments to their own community. After 1933 and with the boycott, only the most necessary expenditures were made. These included the teacher’s salary and running costs such as electricity. Precentor and reader services were no longer taken on from outside, but were done by the congregation’s own members – for a small fee. Bills can now only be paid in installments. The balance of a savings bank account for current expenses melted down to zero. The dissolution of the community after 1938 must have been reflected in a fourth volume for which there is a carryover. This volume is lost.