The piece of artwork was created by Frédéric Baron and Claire Kito, who originally collected the phrase in notebooks by knocking on the doors of embassies and asking their neighbors until they had collected more than 300 languages all expressing the powerful sentiment of love.
http://www.theatlanticcities.com/arts-and-lifestyle/2012/12/paris-wall-i-love-yous/4199/
Image courtesy of Matthieus Mueller/Flickr
Top image courtesy of Flickr user Oh Paris.

