100th Window is the fourth album from the Bristol-based trip-hop group Massive Attack. Of Massive Attack's original core trio, the album only featured Robert Del Naja - Andrew Vowles departed some years earlier, and Grant Marshall was on a sabbatical to raise his young son. Released in 2003, it was written and produced by Del Naja and Neil Davidge, and featured the vocal talents of Horrace Andy and Sinéad O'Connor.
100th Window received a somewhat muted critical reception, many arguing that whilst Massive Attack's previous three albums had all broken significant new ground for the group, 100th Window's dark, brooding sound was merely a continuation of 1998's Mezzanine.
