Just like any other 220-year-old, the iconic Lansdowne portrait of George Washington is in need of some tender love and care.

The National Portrait Gallery is putting the painting on an 18-month hiatus to conserve the painting, which it says is in “stable condition; however, a yellowed varnish coating currently disguises the portrait’s original brilliance.” It was taken down yesterday.

Art conservators will use ultraviolet light, infrared reflectography, and X-rays to figure out how best to treat the portrait. Bank of America is funding the conservation effort.

Painted by Gilbert Stuart in 1796, the portrait has been a part of the museum since it opened in 1968. Initially, it was on long-term lease, though in 2001 the National Portrait Gallery acquired it permanently. Originally, it was a gift for a British supporter of American independence from a Pennsylvania senator.

If you’re jonesing to view a portrait of our first president, the Portrait Gallery has 146 of them in total. It also newly acquired a painting of controversial faux-president Frank Underwood.