This is the same level you unlock the "All seeing eye". Find the net in this level so that you can catch the "light" in two different areas. Once collected in the net, take to the center statue and fill the Angels lantern. Do this three times to be able to move the three bigger blue lamps in different areas on the roof tops. The three lights need to be directed at the bell tower to open the crypt. If the light runs out, collect one more net of light to delight the lantern. Pop.