Lateran Palace, Rome

There were over 1,400 people in attendance at the Fourth Lateran Council. The attendees included Pope Innocent III, 71 patriarchs and metropolitan bishops, 412 bishops, 900 abbots and priors, and several monarchical representatives.

Fifth Council of the Lateran was created in 1512.

Fifth Council of the Lateran ended in 1517.

1215 was the year of the Fourth Lateran Council, I know of no edict from the Holy Father closing Churches at that time.