Opera Boston introduced its compelling new production of Rossini’s rarely heard opera “Tancredi’’ last night at the Cutler Majestic Theatre. Part of the company’s proclaimed mission is to mount deserving works that too rarely make it to the stage, but in this case, the worthy opera had the added benefit of serving as a star vehicle for the magnificent Polish contralto Ewa Podles, in her Boston debut. She did not disappoint.
Rossini’s reputation as a composer of serious dramatic opera has been deeply overshadowed by the success of his comic masterpieces. For its part, “Tancredi,’’ a “heroic melodrama’’ based on Voltaire’s 1760 tragedy of the same name, has a far-fetched plot that centers on two ill-starred lovers: exiled warrior Tancredi (a trouser role written for a contralto) and his true love Amenaide, who has been pledged in marriage to Orbazzano by her father Argirio.