Seitz's work ranged from providing the ornamental frames and print decorations in the rococo style for magnificent editions of Goethe's Faust[1][2] and Schiller's Glocke,[3] with illustrations by Sándor Liezen-Mayer, to elaborately painting the ceiling of the Bavarian court bakers and designing their bread stamps (signa pistoris [es]).

Seitz's spent a year on the designs,[11] but they were ultimately rejected by Wagner as "too bejewelled or too reminiscent of ballet and masquerade".

[15] Seitz's work from this era includes the large fresco in the apse of St. Anna im Lehel church in Munich in 1897 and many other ceiling and wall paintings,[16] illustrations in Jugend (magazine) such as Sommer (1898, No.

Seitz married Carolina Paulina Marotte de Montigny (born c. 1844) in Seeon Abbey in 1869 and had a son, Hans.

[5] Carolina came from a Belgian noble family, who had been admitted to the Bavarian baronial ranks with her father Karl Marotte de Montigny in 1842.