[coydog]

In ancient Rome, human urine was used to launder woolens (because of the ammonia content)

[Williams]

They used it on sailing ships for laundry I think into the 1800’s

[TexasTransplant]

*** “In ancient Rome, human urine was used to launder woolens” ***

More than that they used it to whiten teeth and for Mouth Wash ... (no kidding)