sentences:  According to some accounts, as a young man he took up arms to serve in the Ghibelline army.Once stationed in Poggibonsi, which was experiencing a period of strong economic prosperity, he abandoned his military career and married a young woman of the city, Buona de' Segni—traditionally called Buonadonna.He then became a merchant, serving the large crowd of pilgrims who would travel along the road on which the city lay.