A familiar face, the Red admiral (Vanessa atalanta).
An overwintering specimen as it is still early in the season and it looks like it lived a life already based on the severe damage and wear on its wings. The species overwinters in Southern Europe with SouthWest Germany as its most northern location .
References1 MIKKOLA, K. The Red Admiral butterfly (Vanessa atalanta, Lepidoptera: Nymphalidae) is a true seasonal migrant: an evolutionary puzzle resolved? Eur. J. Entomol., 2003/11/20 2003, vol. 100, no. 4, p. 625-626.