Occupatio
| Periods | 
|---|
| 
 | 
| Constitution | 
| Political institutions | 
| Assemblies | 
| Ordinary magistrates | 
| Extraordinary magistrates | 
| Public law | 
| Senatus consultum ultimum | 
| Titles and honours | 
Occupatio (occupation) was an original method of acquiring ownership of un-owned property (res nullius) by occupying with intent to own.