World’s earliest indoor flush toilet system in private houses found in Lothal, Indus Valley Civilization (c.2400 BCE).

Source: – True Indology / Twitter.

Lothal. World's earliest indoor flush toilet system in private houses. (c.2400 BCE). Gujarat, Indus Valley Civilization. pic.twitter.com/qNhodsmceS

— True Indology (@TrueIndology) February 7, 2017