Gymnastics
Olympics
soccer
Hockey!
Ice Hockey
free style skiing
The main sport in Romania is gymnastics. It isn't as popular there anymore though. It is important to distinguish between the sport that is most popular and the sport at which a nation has done well in the Olympics. For sure, Romania has done well at the Olympics in Gymnastics but that does not mean it is the most popular sport. Generally the most popular sport in any European country is Football (Soccer) because it is the sport played by most people who participate in sport.
It was the most popular sport in the 1936
because it is a popular sport! and most sports in the olympic games are popular
walking eachother
gladiator fights
Probably track and field, since it has been in the Olympics since the original games in ancient Greece.