- We are proud to announce that the young yet already higly acclaimed tenor Hovhannes Ayvazyan will make his house debut as Don Alvaro in a new production by Tobias Kratzer, under the baton of Maestro Jader Bignamini at the Oper Frankfurt on January 27th, further performances are on January 31st; February 3rd, 7th, 9th, 15th, 17th, 23rd, 28th.