Bust by Zacharie Astruc (1833 - 1907)
in Lycée Sophie Germain, Paris

Sketch from the above bust

A larger version

House at 13, rue de Savoie ...

... and the plaque on it.

In fact, this well-known representation of
Sophie Germain is really of a fictional young
girl from a late-19th-century French novel.
See THIS LINK

Portrait by Bronna Butler

A personally designed stamp