Commentary Par XVI 109-111

Carroll: 'Those "undone by their pride" are the Uberti, the great Ghibelline family, banished in 1258, and never allowed to return.  Farinata, who saved Florence after Montaperti (1260), belonged to it ([Inf X 22-27]).  The other family, referred to by its coat of arms, the "balls of gold," is the Lamberti.  To it belonged Mosca, whose famous phrase, Cosa fatta capo ha, sealed Buondelmonte's fate -- and his own ([Inf XXVIII 103-108]).'