Bewley’s Cafe has six stained glass windows designed by renowned artist Harry Clarke in 1927 and installed in the iconic Grafton Street building the following year. For generations, Dubliners and visitors have enjoyed watching the windows as they drank coffee and ate in the well-known cafe. Now, the stained glass windows worth up to €2 million are set to feature in a Commercial Court case listed to begin next Monday, in a battle to determine who owns them.  Ronan Group Real Estate, the owner of the Bewley’s building, is taking declaratory proceedings against its long-term tenant the Bewleys Cafe Grafton…