The old castle was demolished and constructed after the design of Bartolomeo Rastrelli started in 1736. Construction proceeded slowly because part of the materials and resources were transferred to the construction of Jelgava Palace, a project which was more important for the duke.
The old castle was destroyed and then reconstructed based on the plans of Bartolomeo Rastrelli, starting in 1736. The building process was delayed because some materials and resources were used for the construction of Jelgava Palace, which was a priority project for the duke.