El centre europeu de referència per celebrar congressos és a Barcelona: el CCIB fa 20 anys – ARA

Write a detailed and engaging article about El centre europeu de referència per celebrar congressos és a Barcelona: el CCIB fa 20 anys  ARA. The article should be structured with clear distinct paragraphs, each focusing on a specific aspect of the topic. Keep the tone human and conversational while ensuring the content is informative, well-organized, and easy to read. avoid adding a conclusion; focus purely on delivering structured, insightful information.