 The Greater Mysteries took place in Boedromion – the third month of the Attic calendar, falling in late summer around September or October – and lasted ten days.The first act (on the 14th of Boedromion) was the bringing of the sacred objects from Eleusis to the Eleusinion, a temple at the base of the Acropolis of Athens.On the 15th of Boedromion, a day called the Gathering ("Agyrmos"), the priests ("hierophantes", those who show the sacred ones) declared the start of the rites ("prorrhesis"), and carried out the sacrifice ("hiereía deúro," hither the victims).