Csíkszereda Castle, also known as Miercurea Ciuc Castle, is located in the town of Miercurea Ciuc in Romania. This historical site dates back to the 15th century and was originally built as a defensive structure. The castle has undergone various renovations over the years, reflecting different architectural styles. Today, Csíkszereda Castle serves as a cultural center and museum, showcasing the rich history of the Harghita County region. Visitors can explore its exhibits, which include artifacts and displays related to local traditions and the castle's past, making it a significant landmark for both locals and tourists.