Today it is one of the five monuments of cycling, together with Milan–San Remo, Paris–Roubaix, Liège–Bastogne–Liège and the Giro di Lombardia. It is one of the two major Cobbled classics, anticipating Paris–Roubaix, which is on the calendar one week after the Tour of Flanders. The event had its only interruptions during World War I and has been organized without hiatus since 1919, the longest uninterrupted streak of any cycling classic.[1]