For defense reason, the wall was built surrounded the town at the end of 11th century.
In the city centre rose the noble houses of the richest families, each flanked by a tower symbolizing their power. there were 72 towers in its most splendid era.
Wall gave San Gimignano protection, inside the wall, trade was prosperous, wine, wool and followed by saffron. On the facade we saw the coat of arms of wool trade, bucher trade etc.