The park's name means a place of arms, which is the gathering place of a small troop and a central space hosting the important ceremonies of military life.

The park has a monument, part of a fountain (erected in 1915),[1] in its centre.

The park was created between 1640 and 1648 by Governor Charles Jacques Huault de Montmagny.

The Château Frontenac overlooks the square from the south, and the Cathedral of the Holy Trinity from the west.

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