I have a habit when I visit art museums of picking one or two artworks to sketch while I am there. You learn so much by copying the Old (and not so old) Masters. By necessity, each of these were drawn within less than an hour. At a certain point, my back and feet just can't handle standing any more. All these were drawn freehand on iPad, using the Sketch Club app.
Based on a terra cotta bust of Isabella d'Este by Gian Cristoforo Romanov (1465-1512) at the Kimbell Art Museum in Fort Worth, TX,
Based on the painting "Marsh Mallows" by British Impressionist artist Laura Knight (1887-1970)
Based on a statue of a Standing Bodhsattva at the Kimbell Art Musuem.
Based on a sculpted self portrait, by Marion Koogler McNay, at the McNay Museum in San Antonio.
A quick 10-minute sketch of a plaster cast.
Based on the statue of an Angel by Michelangelo in the Basilica of San Domenico in Bologna Italy.
Based on a 6-foot tall ancient Greek bronze at an exhibit in Florence, Italy. Very few of those ancient bronzes survive. Most were melted down to make armaments, doors, things of that nature. Breaks our hearts today, but people tend to be pragmatic at the time. It's only later that we realize what has been lost.