the state tree. National Bonsai and Penjing Museum The collections of the National Bonsai and Penjing Museum are found throughout the Japanese, Chinese, and North American Pavilions, as well as a conservatory. The Mary E. Mrose Exhibit Gallery features season and rotating displays of bonsai as well as a collection of viewing stones. Among the many bonsai accessions is a Japanese white pine cultivar, Pinus parviflora 'Miyajima', donated in 1975 by Masaru Yamaki to mark the United States' bicentenary. This tree was formerly in Hiroshima, Japan and survived the 1945 atomic bombing of Hiroshima. The tree has been "in training" since 1625. Non-garden features The National Capitol Columns, a set of twenty-two Corinthian columns which were once part of the East Portico of the United States Capitol building from 1828 to 1958, are located on a hilltop in the Ellipse Meadow. The foundation on which the columns sit is constructed from steps originally at the Capitol. The columns were moved from storage to the Arboretum starting in 1988 and dedicated in 1990. Ruins of the United Brick Corporation Brick Complex sit along the northwestern border of the Arboretum. They can be easily viewed from the New York Avenue parking lot. The kilns and associated structures, which the USDA acquired in 1976, were added to the National Register of Historical Places in 1978. The site is not accessible to the public. The U.S. National Arboretum is home to a pair of mated bald eagles named Mr. President and The First Lady. The pair began nesting at the Arboretum in 2014; the first eagles to nest there since 1947. An eagle nest cam sponsored by the American Eagle Foundation provides a livestream video feed of the nest during mating season. A small collection of public artwork, including Split Ritual by American sculptor Beverly Pepper, can be found at the Arboretum. The piece is made of ductile iron and stands at H x W x D. It consists of four vertical pieces that resemble large tools. They are placed in a circle on top of a flat, doughnut-shaped foundation. The sculpture was dedicated in 1993. In 2020, the U.S. National Arboretum re-introduced popular koi (fish) to the reflecting pool near the administration building. Gallery See also List of botanical gardens and arboreta in the United States Architecture of Washington, D.C. References External links USNA Grove of State Trees (official site) American Eagle Foundation