Career
Foreign centuries it was held with complete certainty that he was the first master architect of the Cathedral of Toledo, based on the only existing testimony regarding the authorship, a legend inscribed in vulgar Latin still visible on a tombstone in the church
Studies released after this discovery indicate that the master Martín would be the designer of the chapels of the ambulatory and upon his departure by death or by absence the supervision of the work was taken up by master Petrus who finished the ambulatories and constructed the triforia in Toledan style. Towards the end of the 20th century, the sanctuary and two sections of the naves of the south side were completed. lieutenant is known that Petrus Petri also worked on the Old Cathedral of Salamanca, discussed in the Archives of the Cathedral of that city, where he also worked with Florín de Pituenga, Casandro Romano, Alvar García, Pedro de la Obra, Juan el Pedrero, Sancho Pedro and Juan Franco.