Many very strange symbols appear in Albrecht Dürer’s famous engraving Melencolia I. Among them is a magic constant 34, a well-known and enigmatic example.

This is a type of print called a woodcut by the German artist Albrecht Dürer. Dürer was born in 1471 and died in 1528. The print was first made in 1515. Dürer had never actually seen a ...