| Roles | Competed in Olympic Games • Competed in Intercalated Games | |
|---|---|---|
| Sex | Male | |
| Full name | Marius Laurits Theodor Jensen•Thuesen | |
| Used name | Marius•Thuesen | |
| Born | 23 January 1878 in Holbæk, Sjælland |  DEN |
| Died | 12 July 1941 (aged 63 years 5 months 20 days) in København (Copenhagen), Hovedstaden | DEN |
| Affiliations | Københavns Gymnastikforening — København (Copenhagen), Hovedstaden | DEN |
| NOC | Denmark | DEN |
| Medals | IG |
| Gold | 0 |
| Silver | 1 |
| Bronze | 0 |
| Total | 1 |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1906 Intercalated Games | Artistic Gymnastics (Gymnastics) | DEN |
Marius Thuesen | |||
| Team, Men (Intercalated) | Denmark | 2 | Silver | |||
| 1908 Summer Olympics | Artistic Gymnastics (Gymnastics) | DEN |
Marius Thuesen | |||
| Team, Men (Olympic) | Denmark | 4 |
