Which medieval English cathedral has a Great East Window measuring about 22 metres high?

Gloucester Cathedral has a Great East Window measuring about 22 metres high.

The window was created in the 14th century and is one of the defining features of Gloucester Cathedral’s east end. Its immense scale reflects the development of the Perpendicular Gothic style, in which expansive vertical and horizontal window spaces became major architectural features.

The window’s size is especially striking because it occupies much of the eastern wall above the high altar. Medieval stained glass was not merely an illustration added to a finished building: the architecture, tracery, stonework, and glazing were planned together so that large openings could admit colored light.

Gloucester’s Great East Window is sometimes compared with York Minster’s Great East Window. Both are landmark English medieval glazing projects, but they belong to different cathedrals and have different designs, dates, and dimensions. Gloucester’s window is notable for its broad scale and surviving medieval character.