Input (grade 13): RÃ dermark was founded on 1 January 1977 out of the up until this point self-administering communities of Ober-Roden and Urberach.
Output (grade 10): The town consists out of the 2 former independent villages Ober-Roden and Urberach. On 1 January 1977 they were united and became the municipality of RÃ dermark.