The capital city of Amazonas, Manaus is a gateway city to the Brazilian Amazon. It lies at the junction of the Rio Negro and Rio Solimo in northern Brazil. Manaus was significantly affected by the Amazon rubber boom, and the population increased by 158% from 1872 to 1920. Manaus had a population far below one hundred thousand people for most of the 20^th century. However, during the 1960s, the city changed as the Federal Government gave Brazilian manufacturing a reason to move to Manaus. Compared to the rest of the region, Manaus is now the hub of high-quality jobs drawing people from all over Brazil at an unprecedented rate. In the last 30 years, Manaus multiplied its population from around 150, 000 to the current population of 1.5 million. The effect of the rubber industry of the 1900s can be seen in the architecture, and especially in the Teatro Amazonas, a prominent city landmark. The theatre was constructed from the finest materials available, including marble imported from Italy and French glass. Migrants to the area gave the city a European feel that was apparent in the opera performances. Tours of Manaus, including a visit to the Teatro Amazonas, can be organised along with the Tucano Expedition Cruise.