Short answers, pulled from the story.
The official attendance record at Maracana Stadium was set on the 16th of July 1950, when 199,854 spectators attended the deciding World Cup match between Brazil and Uruguay, with actual estimates placing the crowd closer to 210,000. The all-time club record of 194,603 was set during the Fla-Flu derby between Flamengo and Fluminense in 1963.
The Maracanazo refers to Brazil's shocking 2-1 defeat by Uruguay on the 16th of July 1950 in the match that decided the FIFA World Cup. Brazil needed only a draw to win the tournament, but Uruguay won in front of a crowd of nearly 200,000 at the Maracana, turning the moment into one of the most painful events in Brazilian football history.
Maracana Stadium was officially named Estadio Jornalista Mario Filho in September 1966, honoring Mario Rodrigues Filho, a Pernambucan sports journalist and brother of writer Nelson Rodrigues who was a prominent campaigner for the stadium's construction. In March 2021, the Rio de Janeiro state legislature voted to rename the venue after Pele, using his full name Edson Arantes do Nascimento, though that change still required the state governor's approval.
Maracana Stadium has hosted Frank Sinatra in January 1980 for a crowd of 175,000, Kiss in June 1983 for 137,000 fans, and Tina Turner and Paul McCartney in performances that each drew over 180,000 people and earned entries in the Guinness Book of World Records. Other acts include the Rolling Stones, Madonna, Sting, Foo Fighters, and the second edition of Rock in Rio in January 1991 headlined by Prince, Guns N' Roses, and George Michael.
After the 2016 Summer Olympics, Maracana lay dormant for months and fell into disrepair. Photos from early 2017 showed a dried-up playing field, ripped-out seats, and vandalism, while a debt of R$3 million to the energy company led to the power being cut off. On the 5th of April 2017, the French group Lagardere signed an agreement to take over administration, committing to invest more than R$500 million through a concession valid until 2048.
Maracana Stadium currently holds 73,139 spectators, reduced from its original capacity of well over 150,000 as terraced standing sections were replaced with seats and the venue was rebuilt for the 2014 World Cup and 2016 Olympics. It remains the largest stadium in Brazil and the third largest in South America, after Estadio Monumental in Argentina and Estadio Monumental in Peru.