15 August 1483 August 14, 2015 Author: Staff Pope Sixtus IV consecrates the Sistine Chapel. Famous Words of Inspiration..."An economist is an expert who will know tomorrow why the things he predicted yesterday didn't happen today." Laurence Peter — Click here for more from Laurence Peter Related posts: 15 August 1483 15 August 1914 15 August 1969 15 August 1939 31 May 1927 17 April 1964 Categories: History Tags: 1483, 15 August