Events Estimation: Merv in the Seljuk Empire becomes the largest city of the world, taking the lead from Constantinople, capital of the Byzantine Empire.(External Link) February 15 — Pietro Bernardo Paganelli of Montemagno, Calci is elected as Pope Eugene III, and succeeds Pope Lucius II as the 167th pope. Pope Eugene III issues the bull Quantum praedecessores, calling for the Second Crusade. Construction begins on Notre-Dame d'Chartres Cathedral in Chartres, France. Kim Pusik and h… (More on 1145)