Fonseca Guimaraens, often simply called Fonseca, is one of the largest Port wine houses in Portugal. Manoel Pedro Guimaraens established the company in 1822 when he acquired control of the Fonseca and Monteiro Company from the Fonseca Family by purchase of the majority of Fonseca owned shares. A condition of the sale of Fonseca's shares was that the name Fonseca remain as the brand name.