How long did the van eyck altar piece take to create?

The Ghent Altarpiece, created by Jan van Eyck and his brother Hubert, is believed to have taken approximately two years to complete, with work starting around 1420 and finishing in 1422. It is a complex polyptych consisting of multiple panels featuring intricate details and vivid colors, showcasing the artists' mastery of oil painting. The altarpiece is renowned for its artistic significance and has been a major influence in the history of Western art.