While the concept of physical training has existed for centuries, the individual credited with establishing what resembles a modern gym is Franz Nachtegall.
According to available information:
- In 1799, Franz Nachtegall of Denmark established what is believed to be the world's first private gymnastics club, which is similar to what we would consider a gym or even a CrossFit Box today.
Therefore, if by "gym" we mean a dedicated space for structured physical exercise, Franz Nachtegall is a strong contender for the title of "inventor."