Restoration (noun)

1. The process of repairing or renovating a building, work of art, etc. so as to restore it to its original condition.
2. The return of something to a former, original, normal, or unimpaired condition.

Origin:

Late middle english: from old french, from latin restauratio(n-), from the verb restaurare 'restore'.

Examples:

1. The church underwent a major restoration.
2. The restoration of the painting took several months.
3. The restoration of the monarchy in 1660.
4. The restoration of his reputation took years.
5. The company is responsible for the restoration of the historic site.