You might want to spend some time browsing the exhibits at Baikal Museum, Volkonsky House Museum, or Geological Museum. Irkutsk Regional Memorial Decembrists Museum, Trubetskoy House, Irkutsk Academic Drama Theater, and Roman Catholic Parish of the Assumption of the Virgin are landmarks that you won't want to miss. You can watch performances at Irkutsk Musical Theater, Okhlopkov Drama Theater, and Cheremkhovo Drama Theater if you're interested in local theater.