On April 12, 1961, cosmonaut Jurij Alekseevič Gagarin became the first human being to orbit the Earth. The Vostok 1 rocket made it clear how far the Soviet Union was also in the space war and frightened the Americans a lot.
After leaving, the rocket remained in space for a complete circumnavigation of the globe. Gagarin remained in constant contact with the space base and never had to touch the comndi, being all programmed from the ground. The return was the most complicated part: some parts of Gagarin's spherical capsule broke away with difficulty causing very strong oscillations ... luckily the capsule landed intact in the Russian steppe.
The capsule was brought into orbit by 5 rockets connected to the central body and a hatch in the upper part of the structure allowed the capsule to exit and definitively enter orbit.
This set, although minimal and simple (only 400 pieces) tries to faithfully reproduce the shape of the rocket that for the first time brought us into space. It seems fair to me that such an important step forward in the space study is also celebrated with a proper Lego set ...