They openly lived together after the death of Philip"s spouse in 1477. They could not marry, because she was a commoner. He appeared with her in public.
The most representative testimony is probably the first large-scale double-portrait in art history, the so-called Gotha Lovers.
Their relationship is exceptionally well documented. The couple had three children:
Elsa of Hanau, married around 1508 with Heinrich Rabe.
John of Hanau-Münzenberg, a priest in Ober-Roden. Anne of Hanau, married in 1517 with Dietz Reuter, a publican at Ortenberg.
These children could not inherit the county, because they did not belong to the high nobility.
Nevertheless, Philip and Margareta included them in their will.