​TATTA, or Thato, an ancient town of British India, in the Sind province of Bombay, 7 m. from the right bank of the main channel of the Indus and 13 m. from a station on the North-Western railway: pop. (1901) 10,783. Tatta was the capital of the Samma dynasty in Lower Sind in the 16th century, and long continued to be the centre of trade in the country, to which it sometimes gave its name in early European travels. An English factory was established here in 1758, but with- drawn after a few years. There are two old mosques, decorated with the coloured tiles characteristic of Sind.