Hourglass

There are no records of the hourglass existing in Europe prior to the Early Middle Ages; the first documented example dates from the 8th century AD, crafted by a Frankish monk named Liutprand who served at the cathedral in Chartres, France. But it was not until the 14th century that the hourglass was seen commonly, the earliest firm evidence being a depiction in the 1338 fresco Allegory of Good Government by Ambrogio Lorenzetti.

Hourglasses were once very popular on board ships. I drew the bottom half like a boat and used my nature inspired illustration style representing the sea.