Black-clad mourners filled Sanam Luang to capacity on Saturday for an emotional performance of the royal anthem Sansoen Phra Barami in remembrance of the late King Bhumibol Adulyadej.
Police said more than 150,000 people occupied Sanam Luang and side streets in advance of the afternoon spectacle, which began at 1pm as scheduled. More people were expected to continue arriving ahead of a second performance scheduled for Saturday night.
The historic mass singing event was being filmed by the national artist and filmmaker MC Chatrichalerm Yukol. A 100-piece orchestra and a 100-member professional choir conducted by Somtow Sucharitkul accompanied the mass of amateur voices offering their most heartfelt tribute.
The film of Saturday's event is expected to be ready for screening on television and in cinemas by next week.
The mass singing of the Royal Anthem.