The stained glass windows together constitute a very beautiful and important collection of artworks. The Cathedral of Saint Mary of Toledo is one of the Castilian buildings that preserves the most medieval stained glass windows. They were produced from the 14th to the 17th centuries; restorations were done in the 18th century, according to changes in style that had evolved with the passing of the years.The oldest, and also the most appreciated for the beauty of their stained glass, are those of the Rose Window of the transept (over the Portal of the Clock) and some of those of the ambulatory, even though these have a softer color. Then there are those of the main chapel and those of the north aisle of the transept on the east side that display enormous figures of saints and apostles.It is known that those of the main chapel and some of the transept were created by the glass-maker Jacobo Dolfin and his servant Luis, and those of the southern transept and some large windows of the main nave on the Epistle side, by the masters Pedro Bonifacio, Cristóbal, and the German monk Pedro. Later, works by the Toledan master Enrique appear.