If you own an older home, at some point, you might want to remodel or update your property. But if you’re thinking about putting your home on the market—and want to make sure your remodel adds value and makes your property more appealing to buyers—there are certain elements that are best left alone.

A recent article from realtor.com outlined the key architectural elements you should never touch during your home renovation, including:

Bottom line? There’s nothing wrong with renovating older properties. But if you do decide to move forward with renovations, make sure you leave any architectural elements that will help sell your home intact. They’re likely to be the very elements that the buyer for your older home will be hoping to find, and what attracts them to an older home.