In 1961, Philip Johnson designed this small museum to overlook a landscaped terrace that framed a picturesque view of the Fort Worth Skyline. The east elevation features five segmental arches with tapered columns. Behind the arches is an aluminum curtain wall that houses the main museum gallery. The sides of the original building are clad in shellstone. Thos. S. Byrne of Fort Worth was the General Contractor for the original museum structure. Additions to the building, also designed by Johnson were made in 1964 and in 1977. These additions expanded the building back to the corner of Montgomery, Camp Bowie, and Lancaster. By the late 1990's, the building was in need of more space. The solution was to demolish all of the building's additions and then build an even larger addition. This expansion opened in 2001 and was also designed by Johnson. In contrast to the original building, the addition is clad in dark granite and features a domed central circulation space. The museum houses a collection of American paintings, sculptures, prints, and photographs along with its signature collection of art from Charles Russell and Frederic Remington.