The phrase "main courtyard" refers to a central open area, often surrounded by buildings, that is typically found within a larger enclosed space, like a house, school, or palace. Full definition
I asked him about it and he said that two Google employees brought it back from Burning Man and promptly mounted in the main courtyard. (mindbodygreen.com)
The messenger led him at a trot across the main courtyard, down several flights of marble stairs, through a series of tunnels, and then up a sloping ramp onto the wall itself. (bookbrowse.com)
The magic of the night in Cap Rocat enchants the gastronomic restaurant La Fortaleza; inside the main building of the fortress in winter or in the main courtyard in the summer with the subtle sound of the fountains. (travellermade.com)