Conversation so far:
when will the 500 euro note be withdrawn
On 27 January 2019, 17 of 19 Eurosystem's central banks stopped issuing and distributing 500 euro banknotes.
were there banks that kept issuing the 500 euro banknote after January 27, 2019
To ensure a smooth transition and for logistic reasons, the Deutsche Bundesbank and the Oesterreichische Nationalbank opted for longer period and issued banknotes until 26 April 2019.

Question: are the notes still legal tender
Self-contained rewrite: are the 500 euro banknotes still legal tender