The next Harvard experiment with crucial implications for the development of psychedelic research was Walter Pahnke's Good Friday Experiment of 1962. Pahnke set out to determine if psilocybin could be used to facilitate "mystical" experiences and if these experiences could cause permanent and beneficial personality transformation. In order to do so, he recruited 20 Protestant divinity students, 10 of whom would take synthetic psilocybin and 10 of whom would take a placebo. The experiment took place in a basement chapel in which the audio from a Good Friday service conducted in the main chapel upstairs was broadcast.