English: Peleus Waking Thetis - Plate 110, from: Monumenti antichi inediti, by Johann Joachim Winckelmann, 1767 (Roma: A spese dell'autore).

The following description comes from an English translation of "Winckelmann's Images from the Ancient World: Greek, Roman, Etruscan and Egyptian By Johann Joachim Winckelmann":

"Plate 110: Marble bas-relief in the Palazzo Mattei, Rome: Thetis consents to wed Peleus (there had been a prophecy that her son would be greater than his father, so she was avoided by fellow immortals); the armed warrior in the center is Peleus, who is walking toward the sleeping Thetis (who was reluctant to marry a mortal); the lion at his feet symbolizes her elusive transformations; seated behind Peleus are Proteus (who favored his suit) and Thetis' father; at the far left is Amphitrite, wife of Oceanus, withe the zodiac above her; the old man lowering a torch toward Thetis may be Morpheus; the nude woman at the lower right is the Earth; at the far right is Juno, goddess of marriage; and assortment of other gods can be seen in the entire back row of figures."

On another version of this image uploaded by user:Mcapdevila is the following description:

"The first referenced representation of an hourglass it's in a sarcophagus dated ca. 350aD, representing the wedding of Peleus and Thetis, discovered in Rome in the XVIII century, and studied by Winckelmann (1717–1768) in the 19th century, who made special emphasis on the hourglass held by Morpheus in his hands" (see image at: https://commons.wikimedia.org/wiki/File:Peleus-Thetis-350.jpg)