Principal photography had begun by January 21, 2017, at EUE/Screen Gems Studios in the Atlanta metropolitan area, under the working title Motherland. Filming also took place in the Sweet Auburn neighborhood in Atlanta, which doubled as Oakland; the High Museum of Art, which served as the fictional Museum of Great Britain in London; and Atlanta City Hall, which served as a United Nations building. Cinematographer Rachel Morrison, who was eager to work on Black Panther after working with Coogler on Fruitvale Station, first watched all of the other MCU films to understand the established "language". She wanted to "push" that language and feature more contrast in color. Visual effects supervisor Geoff Baumann provided Morrison with before-and-after shots of scenes from Civil War so she could understand what elements are captured on set and what is created digitally. She filmed in 3.4K ArriRaw with Arri Alexa XT Plus cameras and Panavision Primo lenses, primarily using a two-camera set-up with a third or fourth camera on occasion. Morrison said that lighting was her biggest challenge, the magnitude of which "was much bigger than I'd experienced before", and made extensive use of Arri SkyPanel LED light fixtures, which she could preprogram from an iPad. Some sets were completely surrounded by SkyPanels.Shortly after filming started, Kani's son Atandwa stated that he would appear in the film alongside his father, the latter reprising the role of T'Chaka, while on-set photographs revealed that Martin Freeman would reprise his role as Everett K. Ross. Marvel announced that production was underway on January 26, and confirmed the casting of Freeman, Wright, and John Kani, while revealing that Andy Serkis would reprise his role as Ulysses Klaue from Avengers: Age of Ultron. Atandwa portrays a younger version of his father's character, and also served as a cultural consultant during filming. Dialect coach Beth McGuire worked to ensure there was continuity between the various actors who had to use "Wakandan accents". Jordan joined the production later than the rest of the core cast. He felt that this aided his performance, since his character is separate from and in conflict with the other characters. Because of this, Jordan kept to himself while he was on set. Since Black Panther and Avengers: Infinity War were filming simultaneously in Atlanta, both production teams worked together closely to ensure a unified presentation of Wakanda in the films, as the country also plays a large role in Infinity War.Additional filming took place in South Korea, with the city of Busan serving as the setting of a car chase scene that involved 150 cars and over 700 people. Coogler and Morrison referenced the car chase sequences from Bullitt (1968), Drive (2011), and The French Connection (1971), taking the best elements from each for Black Panther's sequence. Filming in Busan began on March 17, at the Jagalchi Fish Market. Filming moved to Gwangalli Beach on March 21, with other South Korean filming locations including Marine City in the Haeundae District and at the Gwangandaegyo Bridge. The production crew hired hundreds of current and former film students from local universities as staff or assistant staff during the South Korea filming. Filming in the country wrapped on March 27, with additional location shooting also taking place at the Rwenzori Mountains and Bwindi Impenetrable National Park in Uganda. John Marzano served as cinematographer for aerial footage of South Africa, Zambia, Uganda, and South Korea. At CinemaCon 2017, Wright was revealed to be portraying Shuri in the film. Filming concluded on April 19, 2017.

Question: When did filming finish?
Answer: April 19, 2017