Francesco Guardi (Venice 1712 - 1793), Head of the Virgin, oil on canvas, 7 by 5 1/2 in. 17.8 by 14 cm. Executed circa 1780-90. Est. 20,000 - 30,000 USD. photo courtesy Sotheby's Sotheby’s Old Master & 19th Century European Art auctions are celebrated...

Jan van Noordt, Family portrait. oil on canvas, 157 by 121.5 cm. Estimate €100,000 - 150,000. © Sotheby’s Amsterdam AMSTERDAM.- The sale of Old Master Paintings at Sotheby’s Amsterdam on 5 May offers great landscapes, still-lifes, portraits, biblical...