Il Sung to design the city's master plan. Moscow Architectural Institute designed the "Pyongyang City Reconstruction and Construction Comprehensive Plan" in 1951, and it was officially adopted in 1953. The transformation into a modern, propaganda-designed city featuring Stalin-style architecture with a Korean-style arrangement (and other modernist architecture that was said to have been greatly influenced by Brazilian architect Oscar Niemeyer) began. The 1972 Constitution officially declared Pyongyang the capital. In 2001, North Korean authorities began a long-term modernisation programme. The Ministry of Capital City Construction Development was included in the Cabinet in that year. In 2006, Kim Jong-il's brother-in-law Jang Song-thaek took charge of the ministry. Throughout the rule of Kim Jong-un a number of residential projects were constructed. In 2013 and 2014 residential projects dedicated to scientists were completed in Unha Scientists Street and Wisong Scientists Street while in 2015 work took place on a residential project in Mirae Scientists Street. In 2017, in dedication to the 105th birthday of the founder and first leader, Kim Il-sung, 3,000 units were built in the new Ryomyong Street complex. The second decade of the 2000s saw the construction of residential projects in Saesalim Street near the Taedonggang Brewing Company in Sadong District (2021), in Taephyong (), and in the Pothong Riverside Terraced Residential District located at the city center next to the Pothong River on land previously used by the headquarters of the International Taekwon-Do Federation. Kim Jong-un ordered that the residential district be renamed "Kyongru-dong" meaning “beautiful bead terrace”. From the 50s to the 70s the area was the location of the residence of Kim Il-sung and was known as “Mansion No. 5”. Other recent public building projects include the Mansudae People’s Theater opened in 2012, the Munsu Water Park opened in 2013, and the renovated and expanded Sunan International Airport and Pyongyang Sci-Tech Complex, both completed in 2015, the Samjiyon Orchestra Theater, which was fitted out of the domed Korean People's Army Circus built in 1964, and the Pyongyang General Hospital, of which construction started in 2020. Additional re-development projects occurred in the area around the Arch of Triumph where the Pyongyang People’s Hospital no. 1 was demolished. Apartment blocks in the area of Inhŭng-dong, in Moranbong-guyok district and in the area of Sinwon-dong in Potonggang-guyok were demolished in 2018-2019 for the construction of new apartment buildings. Also in 2018 the Youth Park Open-Air Theatre in Sungri Street, used