Reunion of three 17th-century optical views: - Nicolas LANGLOIS (1640-1703) engraver and publisher. "La Maison de Mont Loüis au R. Père de la Chaise, prés de Ménilmontant; Portique de treillage pour la maison de Mont Loüis". Etching, titled at bottom. Sight size: Height 24 cm - Width 19 cm - After Hans VREDEMAN DE VRIES (1527-1606?). Perspective view of a canal. Plate from Variae architecturae formae. Engraving. Height 15.4 cm - Width: 21.3 cm - French school of the 17th century. Saint Germain des Près. Engraving (wet), inscription at top. Height : 12 cm - Width : 15 cm