A concert featuring music by Vivaldi and Paganini, conducted by Italian Maestro Gianluca Marcianò and performed by Armenian violinists Hayk Kazazyan and Nikolay Madoyan, was held at the Aram Khachaturian Concert Hall in Yerevan.        During the evening, accompanied by the National Chamber Orchestra, the two musicians performed a wide repertoire of masterpieces written for violin and orchestra by the great Italian classical composers Antonio Vivaldi and Niccolò Paganini, creating an elegant