Alien coins and foreign exchange banking in a medieval commune: Thirteenth-century Lucca

The tithing returns sent to Rome in 1296 from the dioceses of Tuscany reveal a variety of coins, foreign to each particular episcopate, included in the mix. This article deals with the presence, and presumably prior circulation, of coins of foreign provenence in thirteenth-century Lucca as indicated in the Lucchese notarial materials of the period. The results are analyzed and then compared with the representation of the types of coins included in Lucca's 1296 tithe, and explanations set forth as to why certain coins, e.g. the gros tournois, should be conspicuously under-represented in comparison with other Tuscan dioceses while the Venetian groat was over-represented. It is further argued that the determining factor for the lack or abundance of certain alien coins in Lucca turns on the availability or absence of routine mechanisms for the transfer of obligations abroad through foreign exchange banking which obviated the need for significant shipments of physical specie or bullion.