The Hôtel van Eetvelde is a town house designed in 1895 by Victor Horta for Edmond van Eetvelde, administrator of Congo Free State. Together with the Hôtel Tassel, the Hôtel Solvay and his own House and atelier it was put on the "UNESCO World Heritage List" in 2000 as the core of epoch-making urban residences Victor Horta designed before 1900.
The visible application of 'industrial' materials such as steel and glass was a novel for prestigious private dwellings at the time. In the Hôtel van Eetvelde Horta also used a hanging steel construction for the façade. The interior receives additional lighting through a central reception room covered by a stained-glass cupola. An extension to the house was designed by Horta in 1898. This building has a more conventional, beautifully detailed sandstone façade. It was designed to house a garage, an office for van Eetvelde as well as supporting apartments and therefore had a separate entrance.
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.