The Tuscan League's members (originally the communes of Lucca, Florence and Sienna, Vienna, the people living under the castles of Prato and San Miniato, and the bishoric of Volterra) swore not to make any alliances without papal approval  war was to be made on any city, town, count or bishop who refused to join the league..
The original signatories were the communes of Lucca, Florence and Siena, the people living under the castles of Prato and San Miniato, and the bishopric of Volterra. 
