Michelangelo Buonarroti, Study for the Porta Pia, 1561. Chalk and ink on paper, 44.2 x 28.1 cm. Casa Buonarroti, Florence.
Maerten van Heemskerck, Rome, Old Saint Peter’s Basilica and the Vatican Palace, c. 1535. Brown pen on paper, 27.6 x 62.3 cm. Albertina, Vienna.
classicaldrawing:

Michelangelo Buonarroti
Male Nude, Seen from the Rear (recto) 
Black chalk, pen and brown ink
260 x 170 mm
1503-04
Three Nude Dancers by Edgar Degas. Collection of Marcel Bing, Paris.

Maurice Prendergast - Venetian Canal Scene (1898-1899)
Drawing by Henri Matisse. From The Natural Way to Draw by Nicolaides.
Maja Wronska, Lecce, 2013. Watercolor on paper, 42 x 56 cm.
Elizabeth Ockwell, East Door of the Palais Garnier, 2006. Pencil, pen and ink and watercolor on laid paper, 19 x 26 inches.
janpadora-box:

Frank Duveneck (1848-1919, American) - "Grande Canal, Venezia"  1883,
Etching, 11 1/4 x 19 inches.
Watercolor map by Anne E. McGraw of Summit Ridge Studio.