The terrorist attacks in Paris in November 2015 were seen at an attack on French culture and led to an 89% decline in attendance at shows and concerts in Paris over the following month.
Prodiss asked all theatres and concert halls in Paris to change the title of their show on December 18 to "Ma Place Est Dans La Salle" - my place is at the show.
150 shows participated with over 200 artists and actors showing their support.
It became the number one trending topic on Twitter in France with more than 170M Twitter impressions.
All participating shows in Paris sold out on December 18.
"Ma Place Est Dans La Salle" - Prodiss - France
"Ma Place Est Dans La Salle" - Prodiss - France