Graffito

Today's the day ........................... to write on a wall

Graffiti (/ɡrəˈfiːti/; Italian: [ɡrafˈfiːti]; plural of graffito) are writing or drawings that have been scribbled, scratched, or painted illicitly on a wall or other surface, often in a public place.  Graffiti range from simple written words to elaborate wall paintings - and they have existed since ancient times, with examples dating back to Ancient Egypt, Ancient Greece and the Roman Empire.

Here's some from the railway bridge over the Kent on the Oxenholme - Windermere line ......................