A Slice of Light
Casa Batlló is a UNESCO World Heritage site, located at 43 Paseo de Gracia in Barcelona. Originally built in 1877, and remodeled in 1906 by Antoni Gaudi, turning it into the work of architectural art that it is today.
This photo is a detail view of one of the dramatic interior ceiling lights, with light emanating from what appears to be a slice in the ceiling.