 Groups of six were stationed at the Châtelet to guard the prisoners it contained; in the courtyard of the royal palace to protect the relics in Sainte-Chapelle; at the residence of the king; at the Church of the Madeleine on the Île de la Cité; at the fountain of the Innocents at the Place de Grève; and several other points around the city.This policing system was not very effective.In 1563, it was finally replaced by a larger and more organized force of four hundred soldiers and one hundred cavalry that was reinforced during times of trouble by a militia of one hundred tradesmen from each quarter of the city.