Mattarella: 'Navalny's detention is reminiscent of the darkest times' 'His courage will remain an inspiration to everyone' 'I express to the family of Alexei Navalnyj the condolences and closeness of the Italian Republic' 'An unfair and unacceptable price, which brings back memories of darkest times in history. Times that we hoped we would never have to relive again' 'The worst and most unjust conclusion of a human and political story that has shaken the consciences of world public opinion'