Few modern artists create work as immediately recognizable as the art of Ellsworth Kelly, renowned for its vibrant geometric minimalism. To honor what would have been his 100th birthday this year, Park Avenue’s Lever House is celebrating the unveiling of its newly completed renovation (cost: $100 million) with an exhibition of sculpture by Kelly. The year-long show features a blend of indoor and outdoor installations, works that reflect the aesthetics of the restored building and Kelly’s architectural style. Amid the bustle and traffic of Park Avenue, this sleek and calming exhibition is an oasis of zen. —L.H.