The line started forming before the doors even opened. Under a deep blue April sky and temperatures that already felt like summer, Art Cologne Palma Mallorca welcomed its first visitors to the Palau de Congressos this morning. The buzz was immediate. Contemporary art from galleries across the world filled three floors: bold canvases, quiet sculptures, works that stopped people mid-step. Younger artists showed alongside established names. The atmosphere was less formal art world circuit, more…