A more thorough explanation:

Definition: Opus novum (oh-puhss noh-vuhm) is a Latin term that means "new work." In civil law, it refers to a newly constructed structure on a piece of land.

Example: If a person builds a new house on their property, it would be considered an opus novum.

Novi Operis Nuntiatio: Novi operis nuntiatio (noh-vee oh-puh-ris noon-tee-ah-tee-oh) is a Roman law term that refers to a protest against an opus novum. If someone's rights are affected by the construction of a new structure, they can protest to the praetor. The praetor can then order the builder to provide security against any loss caused by the construction. If the builder refuses, the praetor can prohibit further construction with a prohibitory interdict.

Example: If a person's property is damaged during the construction of a new building, they can protest to the praetor and ask for compensation or security against any future losses.

Overall, opus novum and novi operis nuntiatio are legal terms that relate to newly constructed structures and the rights of those affected by them.