Tomar, also known in English as Thomar, is a city and a municipality in Santarém District in Portugal. The town proper has a population of about 20,000. The municipality population in 2011 was 40,677, in an area of 351.20 km². The town of Tomar was born inside the walls of the Convento de Cristo, constructed under the orders of Gualdim de Pais, the fourth grand master of the Knights Templar in the late 12th century.