RickF got it. Generations of Naval Academy plebes have learned from sadistic upper classmen that the longest ship in the U.S. Navy is the U.S.S. Maine, because her foremast is on the seawall of the Naval Academy campus and her mainmast stands on top of a memorial in Arlington National Cemetery.
(Brief pause for the electronic equivalent of vegetable throwing.)
After the Spanish-American War the remains of the Maine were raised from the bottom of Havana Harbor. A Navy board of inquiry studied them and came to the conclusion (still hotly debated) that she had been sunk by an external explosive device. The wreck was then towed out to sea and sunk, with military honors, in deep water - but not before both masts had been removed for preservation.
The foremast (which had been rather thoroughly mutilated by the explosion) was installed in a prominent location overlooking the water at the Naval Academy. A few years later an impressive, walk-in monument, with the mainmast on top of it, was built at Arlington National Cemetery as a tomb and memorial for the ship's crew.
The musical connection: after the German/Soviet occupation of Poland in 1939 the great Polish pianist and statesman Ignacy Paderewski, who, after a long career as a concert artist, had served as prime minister of Poland during the inter-war period, agreed to serve as president of the newly-created Polish Parliament in Exile. In late 1940 he went to the United States (having previously been living in Switzerland); a few months later, in June 1941, he died. His family, and the staff of the Polish embassy in Washington, felt it was obviously most appropriate that Paderewski be buried in Poland, but that wasn't practical. President Roosevelt offered to make a spot in Arlington available as a temporary resting place. Since he had never served in the U.S. armed forces or the armed forces of a nation allied with the U.S., however, Paderewski was not eligible for "burial" at Arlington. So his coffin was placed, above ground, inside the Maine monument. FDR said, "he may lie there until Poland is free." In 1992 Paderewski's body was removed from the monument and, accompanied by a military guard of honor, flown to Poland for permanent interment at St. John's Cathedral in Warsaw. (His heart, according to his own wishes, is encased in a monument at a church in the Polish-American community of Doylestown, Pennsylvania.)
The Maine monument has had one other temporary resident. President Manuel Quezon y Molina, President of the Philippines, died in the United States in 1944. His body was placed in the Maine monument until it could be returned to the Philippines, after the American/Filipino reoccupation.
RickF - the next question is yours!