Unaltered (adjective)

1. Not changed or modified.
2. Remaining in its original state.

Origin:

Late 16th century: from un- (meaning 'not') + alter.

Examples:

1. The painting remained unaltered for centuries, its colors and details still as vibrant as the day it was created.
2. The historic building was unaltered, preserving its original architecture and style.
3. The landscape was unaltered, its beauty and tranquility remaining unchanged by human intervention.
4. The recipe was unaltered, passed down from generation to generation in its original form.
5. The tradition was unaltered, its rituals and customs remaining unchanged for centuries.