and the Spanish–American War, and units from the hospital were sent abroad to treat wounded in World War I and in World War II (to the Pacific theater). The seal of the hospital, chosen by Franklin and Bond, incorporates the story of the Good Samaritan; the phrase "Take Care of Him and I will repay Thee" is used on it. In 1997, Pennsylvania Hospital's Board of Managers made the decision to merge with the University of Pennsylvania Health System. The large health system helps to support the formerly stand-alone hospital with its network of resources. In 2001, Pennsylvania Hospital celebrated its 250th anniversary. Historic firsts Historic library In 1762, the first book for the hospital's medical library was donated by John Fothergill, a British friend of Franklin's. In 1847, the American Medical Association designated the library as the first, largest, and most important medical library in the United States. That year, in 1847, the library contained about 9,000 volumes. The collection now contains over 13,000 volumes dating back to the 15th century—including medical and scientific volumes as well as books on natural history. The library includes the nation's most complete collection of medical books published between 1750 and 1850. The collection also contains several incunabula, books written before 1501, when the printed process was invented. Surgical amphitheater The top floor of Pennsylvania Hospital is the home of the nation's oldest surgical amphitheater, which served as the operating room from 1804 through 1868. Surgeries were performed on sunny days between 11:00 am and 2:00 pm since there was no electricity at the time. The surgical amphitheater seats 180 and with those standing, up to 300 people might be present during any given surgical operation. Physic garden The Board of Managers first proposed the Physic Garden in 1774 to provide physicians with ingredients for medicines. The idea was approved, but financial circumstances intervened and the project was delayed for two centuries. In 1976, the planting of the garden was the bicentennial project of the Philadelphia Committee of the Garden Club of America and the Friends of Pennsylvania Hospital. Located in front of the Pine Building's West Wing, the garden has plants that were once used for medicines to stimulate the heart, ease toothaches, relieve indigestion, and cleanse wounds in the 18th century. Maternity firsts Pennsylvania Hospital is noted for its many firsts in the area of women's medicine, especially in maternity. In