  October 2004 marks the 400th anniversary of the sighting of SN 1604, now
marked by the presence of an expanding nebulosity known as Kepler's supernova
remnant. Of the small number of remnants of historical supernovae, Kepler's
remnant remains the most enigmatic. The supernova type, and hence the type of
star that exploded, is still a matter of debate, and even the distance to the
remnant is uncertain by more than a factor of two. As new and improved
multiwavength observations become available, and as the time baseline of
observations gets longer, Kepler's supernova remnant is slowly revealing its
secrets. I review recent and current observations of Kepler's supernova remnant
and what they indicate about this intriguing object.
