Join九 upcoming events being held in Plovdiv. Plovdiv, Bulgaria's second-largest city, is a vibrant cultural hub boasting a rich history that spans over 8,000 years, featuring Thracian, Roman, and Ottoman ruins, charming cobblestone streets, colorful Baroque and Busbeck architecture, and a lively arts scene, making it an enticing destination for history enthusiasts and cultural explorers alike.