The history of Castellón de la Plana dates back to ancient times, with roots that stretch through Iberian, Roman, and Moorish periods before becoming the modern city it is today. Originally, the settlement was located on a hilltop at a nearby site called La Magdalena to protect its inhabitants from coastal invasions. In 1251, after the Reconquista, King James I of Aragon granted the people of Castellón permission to move the town from the hilltop down to the fertile coastal plain, known as "La Plana." This historic relocation is celebrated annually with the **Fiestas de la Magdalena**, one of Castellón’s most famous traditions, where locals remember their roots with colorful parades, traditional music, and folkloric customs.

Throughout the Middle Ages and Renaissance, Castellón developed as a significant agricultural and trade center, benefiting from its location near the Mediterranean. The city experienced growth during the industrial era, which brought about modern infrastructure, and by the 20th century, it was further expanded with its bustling port area, **El Grao de Castellón**, which strengthened its economy through trade and fishing.

Today, Castellón de la Plana is a dynamic city that honors its past while embracing modernity. The historic center, with landmarks like the **Concatedral de Santa María** and the 16th-century **El Fadrí** bell tower, reflects centuries of history, allowing visitors to step back in time while exploring the city’s rich heritage.