First, I remember the reference to Canterbury, a new period for Gothic outside of France.
The cathedral, dedicated to Mary as Our Lady (French: Notre Dame), is the successor church to the 6th-century church dedicated to Saint Thyrsus, later named Saint-Maire. The Carolingian building was replaced by an early Romanesque church around 1000. A century and a half later, construction began again.
Three construction phases can be distinguished:
Under Bishop Landry de Durnes (Landric de Dornac) an ambulatory choir was erected to the east. Archaeologically proven is the outer wall of the ambulatory with round ends of three (probably a total of five) radially adjoining chapels. Capitals found still had Romanesque forms.
From around 1190 onwards, under the direction of the so-called Master of Lausanne, extensive reconstruction and new construction took place: the first ambulatory was replaced by the present one, early Gothic with a polygonal ambulatory and only one, still round, axial connecting chapel. To the west, the building grew around the crossing with the lantern tower, the transept and a large part of the nave.
Around 1215 the master builder Jean Cotereel began to complete the nave and build the western end of the church
Around 1225 to 1235 the portail peint, remarkable for its decorative figures and the preserved polychromy, was added to the southern outer wall of the nave. Finally, in 1275, the Notre-Dame Cathedral was consecrated in the presence of Pope Gregory X and King Rudolf von Habsburg.
Source: Wikipedia