It was a quiet, early spring day - about 50 degrees and slightly overcast -- in medieval Old Town, Tallinn, the capital of Estonia and a UNESCO World Heritage Site. My companions and I were enjoying a stroll along the cobblestone streets, checking out art galleries and craft and vintage shops. On Pikk Street, we slipped into Cafe Maiasmokk (www.kalev.eu/en/maiasmokk-cafe/cafe), a historic Viennese-like coffee house, the oldest in the city, dating back to 1864. We found a seat in the back against the precisely carved Art Nouveau wood paneling, where we could easily gaze up at the magnificent hand-painted glass ceiling. We ordered coffee and the signature marzipan cake, and to our surprise were soon also greeted by a town violinist, who serenaded us with Gershwin tunes.