Short answers, pulled from the story.
Capitol Records was founded on the 2nd of February 1942 when songwriter Johnny Mercer met with Glenn Wallichs to discuss an investment from Paramount Pictures. The company was officially incorporated on the 27th of March 1942 under the name Liberty Records before changing its name to Capitol Records in May.
The thirteen-story Capitol Records Tower was designed by Welton Becket with Louis Naidorf serving as project designer and completed in April 1956. It sits north of the intersection of Hollywood and Vine and features a circular shape that mimics a stack of gramophone records atop a phonograph.
EMI purchased Capitol Records for $8.5 million in 1955 acquiring 96% of its stock which ended the mutual distribution agreement between EMI and RCA Victor in the Western Hemisphere until 1957. In June 1997 Capitol together with Virgin Records absorbed EMI USA which then folded and recorded music operations were sold to Universal Music Group in 2012.
Capitol opened a branch office in Canada in 1949 and began releasing albums in the UK on the Capitol label by Decca starting in 1948. Albums released in the United States contained fewer tracks usually no more than 11 or 12 compared to albums released in the United Kingdom due to differences in how publishing royalties were calculated.
An inner wall floating on layers of rubber and cork was erected inside the building's concrete exterior walls leaving a one-inch air gap to provide complete sound isolation. The facility also features eight trapezoidal subterranean echo chambers located underground with 10-inch concrete walls that allow engineers to add reverberation during the recording process.