This is usually done to preserve the character of an area.

The site has been closed to public since the 1940s, preserving its character.

Some are being added to in ways that do not preserve their historic character.

"But in order to preserve the character of the town, the leaders have chosen not to do that."

"It is extremely important to us that we preserve the character."

It was a compromise designed to preserve the character of the area.

It is covered by a conservation area to preserve its character.

The building was restored beginning in 1999 to preserve its historical character.

"They wanted to preserve the rural character of the village at all costs," he said.

Some are being added to in thoughtful ways that preserve their original character.