Hamina Fortress is a unique circular star-shaped bastion fortress designed in the 1720s by Swedish General Axel von Löwen based on Italian Renaissance military architecture, making it globally rare as one of only two towns built within an active fortress—the other being Palvanova, Italy. The distinctive layout features eight radial streets radiating from the Town Hall Square at the fortress's center, creating an extraordinary geometric urban plan. Russian forces continued fortification work in the 1740s and under General Alexander Suvorov, who constructed the Central Bastion between 1803 and 1811, which became the fortress's largest bastion structure. Today, the Central Bastion functions as Hamina Bastion, an event venue topped with Europe's largest canopy for summer programming, while a 4.5-kilometer Fortress Trail meanders along the ramparts, allowing visitors to experience the remarkable integration of military architecture and urban planning.