How long did it take to build the shrine of imam Hussein?

The construction of the Shrine of Imam Hussein in Karbala, Iraq, began shortly after the martyrdom of Imam Hussein in 680 CE. The initial structure was completed relatively quickly, but it has undergone numerous renovations and expansions over the centuries. Major renovations occurred during the Abbasid and Ottoman periods, with the most significant modern reconstruction taking place in the early 20th century. As a result, the timeline for its development spans over a millennium.