Viamão is a city in Rio Grande do Sul, Brazil. In size it is the largest municipality in the metropolitan region of Porto Alegre and the seventh most populous in the state.The origin of the name Viamão is controversial. The more common explanation is that atop the hills of the region it is possible to see the Guaíba River and its five inlets: Jacuí, Caí, Gravataí, Taquari and Rio dos Sinos, which form an open hand. This is said to have lent the city its name -from the phrase "Vi a mão," meaning, "I saw the hand."HistoryIn the 18th century the region of the modern state Rio Grande do Sul was a trade route between the cities Sorocaba and Colônia do Sacramento. Various colonists created cattle ranches and plantations here. In 1725, Cosme da Silveira, a member of Captain João de Magalhães' fleet, settled in the Viamão region. He was joined by Francisco Carvalho da Cunha in 1741, who created the Estância Grande site, where the church of Nossa Senhora da Conceição (Immaculate Conception) would be built. In 1747, the colony was declared a civil parish. With the Spanish invasion of 1766, it became necessary to install a government center for the captaincy. Viamão served as the seat of the governor until 1773. At that time, the seat was transferred to Porto dos Casais (which later became Porto Alegre). In 1880, Porto Alegre became its own separate municipality.