This book is an amalgamation of the first Greek edition of Tasos Tzamalis’ book "Nομίσματα της Φραγκοκρατίας 1184-1566 (Athens, 1981) and the articles he published in various periodicals in the years following in which he developed his theories about the Frankish coinage. In the two long articles, "The tornesio" and "The first period of the tornesio", among others, the author based on the secret signs (control marks) of the coins proves the existence of a third Mint in the Principality of Achaia; also the articles "Princess Isabelle and her husbands", "The Frankish Mint of Athens" and "The Elis/1964 hoard" are particularly important in this respect. Much of the material presented here appears in English for the first time.