The Round table "Women FOR the Union State: Historical, Cultural and Spiritual Alliance of the Peoples of Belarus and Russia" was held at Mir Castle on September 30, 2021.

The Mir Castle Complex Museum was awarded with the 1st degree Diploma in the nomination "Video" of the Republican Contest of Social Advertising.

Republican seminar on educational tourism was held on September 24, 2021.

For the first time in the history of the museum, the main exposition of the topic Defensive Architecture of the Grand Duchy of Lithuania of the 16^th–17th Centuries was replenished with original firearms – Hackbut barrels of the 16^th–17th centuries from the former arsenal of Mir Castle.

On September 17, 2021, an event dedicated to the celebration of the National Unity Day was held at the Mir Castle Complex Museum.