In jewel-box setting, Chicago Opera Theater polishes rare Tchaikovsky treasure ‘Iolanta’

Review: It’s not often that you can pull a forgotten gem out of the trunk, showcase it in a tasteful setting, and reveal it for the magnificently neglected thing that it is. Chicago Opera Theater has succeeded in doing us that favor with Tchaikovsky’s dreamy, naturalistic 1892 opera “Iolanta” – the composer’s last – performed by able forces at the Studebaker, a lovingly refurbished 740-seat jewel-box on Michigan Avenue that also dates from that same last decade of the 19th century. ★★★