Named after the Sackheim district, the current gate was built in the middle of the 19th century.
It replaced an earlier version which was erected during the construction of the first city walls of Königsberg at the beginning of 17th century.
After restoration will be completed, the gate will be used by the Centre of Standardisation and Metrology, a Russian federal government agency.
It will accommodate laboratories and a small museum, where weights and other antique measuring instruments will be on display.
In the past each side also had smaller arches, which may have been pedestrian passageways, but these have since been torn down.