The National Cathedral suffered some significant structural damage in the earthquake, with the tops of three of its tower pinnacles falling over, and cracked walls in buttresses and on upper floors. More info from their earthquake press release:
Three of four pinnacles (corner spires) on the central tower have been damaged. Specifically, three “finials” (capstones shaped like fleurs-de-lys) have fallen from them, with more significant damage to two of the pinnacles. Similar decorative elements on the Cathedral’s exterior also appear to be damaged. Cracks have appeared in the flying buttresses around the apse at the Cathedral’s east end, the first portion of the building to be constructed, but the buttresses supporting the central tower seem to be sound.
No individuals were injured either within the Cathedral or on its grounds. Despite some cracks on upper floors in the interior, no damage to the stained-glass windows has been reported. The building has been closed to visitors until further notice.