Art Deco Catholic Cathedral of Our Lady of the Immaculate Conception was built four years later, and Maputo City Hall was completed in 1947. In 1962, the National Library of Mozambique was established, and in 1968, the Estádio Salazar inaugurated in Matola. Until the mid-1970s, thousands of Rhodesian and South African tourists frequented the city, drawn by its scenic beaches, high-quality hotels, restaurants, and lively entertainment scene, including casinos and brothels. With wide avenues lined by jacaranda and acacia trees, it earned the nicknames City of Acacias and the Pearl of the Indian Ocean. In 1970, Tempo, the first full-color magazine in the country, began publication as a voice of opposition to Portuguese colonial rule. In 1970, the city had a population of 383,775. Independence, 1975–present Lusaka Accord and aftermath In April 1974, the Carnation Revolution in Portugal overthrew the Estado Novo regime, which had defied the European trend of granting independence to African colonies. On 4 August, the new Portuguese government pledged to grant independence to Mozambique soon. Later that day, a crowd of 30,000 gathered in Lourenço Marques to show support of the Portuguese government's decision. With the signing of the Lusaka Accord on 7 September 1974, the ten-year Mozambican War of Independence ended in a ceasefire and the transition to independence began. The day the Lusaka Accord was signed, a group of right-wing white dissidents, calling themselves the Movement for a Free Mozambique, challenged the independence deal by attempting to seize control of Lourenço Marques. The dissidents freed a former secret police officer from prison and occupied the city's post office, the airport's air traffic control tower, and the main radio station, taking women and children hostage. From the radio station, they broadcast demands for Portugal to grant Mozambique independence without handing over power to FRELIMO, so that the Movement for a Free Mozambique could set up a "multiracial" government. Police and Portuguese soldiers surrounded the occupied sites, but did not immediately remove the dissidents because they were keeping hostages. Just outside the city, two whites and one black person were killed when black counter-demonstrators stoned a vehicle being driven by dissidents at the airport. Portuguese authorities reported that no other areas of the country besides the capital saw any violence occur in reaction to the Lusaka Accord. In response to the white backlash, FRELIMO said they would "smash the rebellion" with the help of Portuguese troops.