The Principality also produced a unique set of laws, the Assizes of Romania, which combined aspects of Byzantine and French law, and became the basis for the laws of the other Crusader states. Several Byzantine titles such as "logothetes" and "protovestarius" continued in use, although these titles were adapted to fit the conceptions of Western feudalism. The Byzantine "pronoia" system was also adapted to fit Western feudalism; peasants ("paroikoi") technically owned their land, but military duties and taxes that they had not been subject to under the "pronoia" system were imposed on them by their new French lords.