The Lord Mayor of Melbourne has resigned after sexual harassment allegations were made against him almost two months ago.

CouncillorĀ Robert Doyle, who has since been admitted to hospital due to poor health, says he felt he hadĀ been denied the principles of fair justice during the City of Melbourne investigation.

Mr Doyle, who has been mayor since 2008, also resigned from his position as chairman of Melbourne Health, following a separate investigation after a third woman accused him of harassment at a hospital event.