Cetatea Alba, also known as Alba Carolina Fortress, is a historic fortress located in Alba Iulia, Romania. Built in the early 18th century, it is a prime example of Vauban-style fortifications. The fortress features impressive walls, bastions, and gates, showcasing military architecture from the period. The site has significant historical importance, as it played a key role in various military conflicts and the unification of Transylvania with Romania in 1918. Today, Cetatea Alba serves as a popular tourist attraction, offering visitors a glimpse into Romania's rich history and architectural heritage.