The nearby Andromeda Galaxy has a supermassive one of these at its center
The Milky Way is on a collision course with the nearby Andromeda... [DOC] [TLE] Andromeda's Unstable Black Hole - Universe Today [PAR] The Andromeda galaxy, the closest spiral galaxy to our own Milky Way, has a 
supermassive blackhole at the center of it much like other galaxies.