In the past times women didn’t have so much spare time since they had no help from technology and the home works were all hand made. Before the washing machine was invented they had to go to the public lavatory to wash their “dirty clothes” in public (even because neither water supply reached the residential buildings as nowadays).
One of these places in Rome was decorated with an inscription inciting women to do their job at the best and in any way possible. The plate has the following text:
LE CONSIENCIE MONDE AVER CURATE/ SÌ COME I PANNI BIANCHI QUI VOI FATE
(mind to keep your conscience as pure white as the clothes you’re washing here)
This lavatory doesn’t exist anymore but its plate has been walled up in the courtyard of one of the brightest churches in Rome, Santa Maria in Campomarzio, where you can find the inscription in the inner courtyard.