in fact it was the historical cathedral in which we see the status in september of one thousand nine hundred seventy eight so to celebrate this special anniversary the city of often put on an impressive light show we were on hand to see it for ourselves. the most famous cathedral bathed in light this city landmark was transformed as part of special anniversary celebrations forty years ago it was the first building in germany to be declared a unesco world heritage site the weather was cold and rainy for the opening night of celebrations but that didn't put a damper on people's spirits lighting designer christophe dillon has been working for one years straight to put this project together. it's in the problems of the office this is all about showing how the cathedral has always been exposed to danger in the course of its twelve hundred years in mother and how the people of arkan have always saved it. on the ah in the context of this festival week that