Short answers, pulled from the story.
Tate Modern was opened by the Queen on the 11th of May 2000. It received 5.25 million visitors in its first year, compared with the 2.5 million visitors the three existing Tate galleries had received combined in the previous year.
Bankside Power Station was designed by Sir Giles Gilbert Scott, the same architect responsible for Battersea Power Station. It was built in two stages between 1947 and 1963.
Jacques Herzog and Pierre de Meuron of Herzog and de Meuron were announced as the winning architects in January 1995. The £134 million conversion began in June 1995 and was completed in January 2000.
The Blavatnik Building is a ten-storey tower, 65 metres high, that opened on the 17th of June 2016 as an extension to Tate Modern. It was formally renamed in May 2017 after Anglo-Ukrainian billionaire Sir Leonard Blavatnik, who contributed a substantial portion of the £260 million cost.
In 2013, Tate Modern signed a ten-year sponsorship deal with Hyundai worth around £5 million, at the time considered the largest amount of money ever provided to a single gallery or museum in the United Kingdom. The deal funds an ongoing series of large-scale commissioned works in the Turbine Hall.
In 2025, Tate Modern had 4,514,266 visitors, making it the most popular art gallery in the United Kingdom and the fourth most popular attraction in the country overall.