This inscription, for which I am indebted to Canonico Pietro Tonarelli, is especially valuable, not only in fixing the epoch of Giovanni Buono da Bissoni's work, but as proof of the organization of the lodge and the brotherhood of its members. The word _fratrum_ certainly implies that the _laborerium_ was in the hands of a guild. The Canonico Tonarelli writes in a letter from Parma, that in an estimate in the archives of the Chapter, dated 1354, the _Fabbriceria_ was denominated _Domus laborerii seu fabricæ ... majoris Ecclesiæ_, and that the administrators were called _fratres de Laborerio_. In Tuscany they were called _Operai_, and the office of administrator was the _Opera del Duomo_. The four names of the _fratres_, too, have a significance when read in the light I have since found thrown on the organization by the archives of the _Opere_ in Siena and Florence. In those lodges one perceives plainly that the administration of the lodge was placed under four persons, of whom two were Masters of the guild, and two were influential persons of the city, _i.e._ half the council of administration gave the votes of the architects employed, and the other half those of the patrons who employed them. That the same rule held in this earlier lodge at Parma is confirmed by the fact that Niccolao and Benvenuti are found working together with Giovanni Buono at Pistoja in 1270.[142] Sometimes a single name stands out among the file of Comacines, and one finds several well-known buildings that have emanated from one mind. Such a Master was Magister Giorgio of Jesi, near Como. His name is graven in the stones of many a church. At Fermo on the Adriatic, a "sumptuous" cathedral was built in 1227; a certain Bartolommeo Mansionarius being the patron. On the left south door was a slab with the inscription--"A.D. MCCXXVII Bartolomeus Mansionarius Hoc opus fieri fecit Per Manus Magistri Georgii de Episcopatu Com".... That the mutilated word is Como we prove by a similar inscription on the cathedral at Jesi (the ancient Æsis where the Emperor Frederick II., grandson of Barbarossa, was born). The ancient cathedral of S. Septimus, a truly Lombard building, still exists in part. Here the inscription runs--"A.D. MCCXXXVII tempore D. Gregorii Papae domini Federici Imperatoris, et domini Severini. episcope. æsini. Magister Georgius de Cumo civis æsinus fecit hoc opus."