The European Central Bank host the ECB Forum on Central Banking in Sintra, Portugal from 18 to 20 June 2018
I won't be attending after the ECB implemented their harsh 'no riff-raff' policy.
But, there will be plenty of central bank speeches. The event opens on Monday with opening remarks from Mario Draghi, President of the European Central Bank and will continue Tuesday and Wednesday.
For the full agenda, check this out: