Black holes are regions of space where gravitational forces are so strong that nothing, not even light, can escape. Black holes have captured the imagination of the public like no other astrophysical entity and been readily absorbed into science fiction. However, despite endless conjecture, they still remain mysterious objects. So what do we really know about black holes? What have we actually observed? This session will uncover the current research in both experimental and theoretical physics, and how, together, they can build a picture of the modern black hole, and help us to gain a better understanding of the Universe.