My understanding from reading the article is that The Definitive Biography of P D Q Bach gives the DoB as 1 April 1742 and the DoD as 5 May 1807 it s just his grave where the dates are shown the other way round followed by a question mark On second thoughts the bracketed form for DoB and DoD in the lead might lend itself to the reverse order plus a question mark I admit that my removing the circular link to Baden Baden Baden was done from a Wiki instinct and not appropriate for this page the dates altogether from the lead seems rather dour and I suggest to reinstate this or a similar version P D Q Bach May 5 1807 Baden Baden Baden April 1 1742 Leipzig