After extensive and thorough research spanning forty years of studying Antonio Vivaldi's sources and compiling his vast catalog (RV), Federico Maria Sardelli has succeeded in tracking down, reconstructing, and restoring no fewer than 18 arias from "La Costanza Trionfante," RV 706-A, a lost work bearing witness to the Red Priest's most flourishing creative period. It is a substantial fragment that quantitatively comprises approximately half of the opera and gives a concrete and surprising impression of its exceptional quality. Leading the modo antiquo baroque orchestra with an outstanding cast, Federico Maria Sardelli offers audiences the world premiere of this extensive fragment with previously unpublished arias in modern times: a unique opportunity to enjoy a title that is entirely new and unrepresented in today's repertoire. The singers are Cecilia Molinari, Valeria La Grotta, Valentino Buzza, and Biagio Pizzuti.