the treeline — Discover Exciting Open Calls and Opportunities for Artists Worldwide Join our prestigious group of galleries located in London, New York, Paris, and Athens. We offer artists the chance to showcase their work through our physical and digital art shows, reaching a global audience. Participate in our thrilling pop-up shows across the USA, Europe, and Asia, and connect with art lovers from around the world. Don’t miss out on these incredible opportunities to expand your audience and enhance the visibility of your creations. Join us today and let your art shine on the international stage!