The retired numbers were displayed behind the old Yankee Stadium's left field fence and in front of the opposing team's bullpen, forming a little alley that connects Monument Park to the left field stands. When the franchise moved across the street to the new stadium, the numbers were incorporated into Monument Park that sits place in center field between both bullpens. The 21 numbers are placed on the wall in chronological order, beginning with Lou Gehrig's number 4. This was retired soon after Gehrig left baseball on July 4, 1939, the same day he gave his famous farewell speech. His was the first number retired in Major League Baseball history. Beneath the numbers are plaques with the names of the players and a descriptive paragraph.