The adoration of the mystic lamb, also known as Ghent Altarpiece, was begun in the mid-1420 and completed before 1432 by Jan van Eyck and his brother Hubert. Jan van Eyck was a Flemish painter who was one of the founders of Early Netherlandish painting, the medium that Jan van used was oil and oak wood to make this painting. There is no convincing information to determine artistic attribution. The Ghent Altarpiece is a large and complex 15th-century polyptych altarpiece in Saint Bavo’s Cathedral chapel in Belgium, but it was moved for security reasons to the main cathedral chapel, where it is today. The altarpiece is considered a masterpiece of European art and one of the world’s treasures. The Altarpiece has been the victim of 13 crimes since its installation, and seven thefts. Nearly 600 years old, the panels have been threatened by theft, war damage, peace settlements, outbreaks of iconoclasm , and have suffered fire damage. The idealization of traditional medieval art gives way to realistic representations of nature and humanity.