Today, the dance music world is mourning the death of Frankie Knuckles, "The Godfather of House Music," who passed away Monday at the age of 59, due to what is believed to be complications related to Type II Diabetes. This morning, fellow Chicago House icon David Morales expressed his sorrow for the loss of the legendary artist.

Frankie Knuckles & David Morales

The Bronx, New York-born DJ was known for hits like "The Whistle Song" and "Rain Falls," and played a tremendous role in the popularization of Chicago House music. A pioneer and an innovator, the impact Frankie Knuckles had on music will truly last forever. Listen to some of his biggest tracks and watch his boiler room set below.

Rest in Peace, Frankie Knuckles.