The traces left in Gau-Algesheim by the Catholic priest Peter Koser from 1869 to 1890 are still apparent today. The "Rheinischer Volksbote" (“Rhenish Messenger”), first published by the printer Reidel in 1869 and under Father Koser's editorship, was for decades a regionally important organ of the Catholic Centre Party. A teacher preparation institute (an institution that prepared students for teacher's college), known to locals as the "Lateinschul" (“Latin School”) or the "Aljesemer Hochschul" (“Algesheim College”, in dialectal German), a childcare centre, a credit and savings union on a coöperative basis, a farmers’ and consumers’ association, and not least of all the newly built Catholic parish church and the establishment of church music in 1888 confirm Peter Koser's religious and sociopolitical contributions in a time of political and ideological struggles.