At the time of this show's 1968 Greenwich Village debut, French singer-songwriter Jacques Brel's body of theatrically insightful ballads was already an obscure but deeply influential treasure trove for many musicians. The revue's success would go on to influence artists as diverse as Leonard Cohen, Bowie (who covered "Amsterdam" shortly thereafter), and Sinatra, and it may even be responsible for one-hit wonder, Terry Jacks's revival of "Seasons in the Sun". More important, the pioneering musical-without-a-book helped introduce Brel's oft-brooding, ever evocative art to a wider audience — and arguably had an evolutionary influence on Broadway itself.