Peacock alert! In celebration of its 30th anniversary, Pitti Uomo, Florence’s biannual menswear trade show, has mounted a retrospective of high points and turning points in men’s fashion of the last three decades. The distinguished historian Olivier Saillard curates, pulling 150 pieces from the pantheon—names like Armani, Brunello Cucinelli, Rick Owen, Paul Smith, and Yohji Yamamoto. —L.J.