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Nude studies of boys for the figures of angels in the painting ;The Immaculate Conception of the Blessed Virgin Mary (1864) --Józef Simmler (波兰画家, 1823-1868)
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Sheet of Sketches; Frieze of Dancing Women, Dancing Women at the Foot of an Obelisk, and Two Seated Female Figures in a Pendentive (ca. 1798) --Hubert Robert (法国艺术家, 1733-1808)