The United States District Court for the District of Puerto Rico (in case citations, D.P.R.; ) is the federal district court whose jurisdiction comprises the Commonwealth of Puerto Rico. The court is based in San Juan. The main building is the Clemente Ruiz Nazario United States Courthouse located in the Hato Rey district of San Juan. The magistrate judges are located in the adjacent Federico Degetau Federal Building, and several senior district judges hold court at the Jose V. Toledo Federal Building and U.S. Courthouse in Old San Juan. The old courthouse also houses the U.S. Bankruptcy Court. Most appeals from this court are heard by the United States Court of Appeals for the First Circuit, which is headquartered in Boston but hears appeals at the Old San Juan courthouse for two sessions each year. Patent claims as well as claims against the U.S. government under the Tucker Act are appealed to the Federal Circuit. The current United States Attorney is W. Stephen Muldrow. Scope and relevance The United States first established a federal court in Puerto Rico under the Foraker Act of 1900. This court was a territorial court, operating within what the Supreme Court would soon define in the Insular Cases as an unincorporated territory of the United States. As such, the court was established under Article IV rather than Article III of the United States Constitution. The Supreme Court of the United States discussed the nature of the court in Balzac v. Porto Rico, 258 U.S. 298 (1922). Because the court was a territorial court rather than a full-fledged District Court, its judges did not enjoy Article III protections such as life tenure. The District Court in Puerto Rico continued to be an Article IV court even after Puerto Rico attained its commonwealth status. However, in 1966, the U.S. Congress conferred life tenure on the federal judges of Puerto Rico, transforming the court into a full-fledged Article III district court with the same status as the other United States District Courts throughout the country. The congressional report on the bill making this change described the change of status as being "appropriate in light of the court's caseload and the conferral of Commonwealth status on Puerto Rico," and also explained: There is no reason why the U.S. District Judges for the District of Puerto Rico should not be placed in a position of parity as to tenure with