Israel Trip - Capharnaum

Capharnaum is the excavated remains of the town where Jesus lived. Among the significant excavated structures are the old synagogue and the house of Peter. Above the house of Peter is an octagonal Church standing on pillars to preserve the remaining excavated stones of the house. In the middle of the church is a glass window that shows the excavated house below. Our guide pointed to a room in the excavated house and said that Jesus use to sleep on that room. My eyebrow rose immediately in skepticism. How do they know that Jesus stayed in that particular room??? In fact the claim that the excavated stone remains was indeed Peter's house is rather dubious already. They might as well claim that the cat we saw in the area is the descendant of Peter's cat!