Cosma e Damiano from Pisa, and it was Guido, not Nicholas, who was his early protector at the papal court. Geisthardt has established that Boso was born probably at Loppia near Lucca in Tuscany. His conclusions are now accepted in academic literature.
Cosma and Damiano were from Pisa, and it was Guido rather than Nicholas who supported him early on at the papal court. Geisthardt has shown that Boso was probably born near Lucca in Tuscany. His conclusions are now widely accepted by scholars.