Chartres old town is located to the banks of the Eure River, which at this point divides into three branches. The rives is crossed by several bridges, some of them ancient, and is fringed in places by remains of the old fortifications. The Porte Guillaume (14th century), a gateway flanked by towers, is the most complete specimen. The steep, narrow streets of the old town contrast with the wide, shady boulevards which encircle it and divide it from the suburbs. The Cbs St Jean, a pleasant park, lies to the north-west, and squares and open spaces are numerous.
TheHotel de ville, a building of the 17th century (containing a museum and library), an older hotel de ville of the 13th century, and several medieval and Renaissance houses, are points of interest. There is a statue of General F. S. Marceau-Desgraviers (b. 1769), a native of the town.
References:Bomarsund fortress and garrison was built in 1832-1854 by Russian Empire to defence Åland Islands against enemies. British and French fleet attacked against it during the Crimean War in 1854. After a week of fighting the British stormed the remaining fort. Anglo-French forces destroyed it totally after battle. In the Treaty of Paris 1856, the entire Åland Islands were demilitarized, which is a status that has been preserved until this day.
Nowadays there are some ruins left and fortress area is open for visitors.