In the history of gardens the High Medieval hortus conclusus typically had a well or fountain at the center, bearing its usual symbolic freight (see “Fountain of Life”) in addition to its practical uses. The convention of four paths that divided the square enclosure into quadrants, was so strong that the pattern was employed even where the paths led nowhere. […]
Sitting, walking and playing music were the activities most often portrayed in the numerous fifteenth-century paintings and illuminated manuscripts, where strenuous activities were inappropriate.
Source: Hortus conclusus – Wikipedia