A more thorough explanation:

Term: Murorum Operatio
Definition: Murorum operatio is a historical term that refers to the repair work done by the inhabitants of buildings, cities, or castles to fortify their structures. Example: During the medieval period, the people of a city would come together to repair the walls and gates of their city to protect themselves from invaders. This repair work is an example of murorum operatio. The term murorum operatio refers to the repair work done by the people of a community to fortify their structures. This could include repairing walls, gates, or other fortifications to protect themselves from invaders. The example provided illustrates how people in medieval times would come together to repair the walls and gates of their city to protect themselves from outside threats.