Final answer:
The sermon "The Finished Work of Calvary" was preached by Pentecostal leader William Durham, known for his controversial views on sanctification.
Step-by-step explanation:
The stirring and ultimately divisive sermon entitled "The Finished Work of Calvary" was preached by the Pentecostal leader William Durham. Durham was known for his views on sanctification, which differed from the traditional Pentecostal position and led to considerable debate within the movement. This sermon is a significant historical event in the Pentecostal church as it highlighted the rifts within the early Pentecostal community over doctrinal issues.