After a nice walk in Tallinn Old Town the guide will bring you to one of Europe’s grandest maritime museums, where you can discover history of The Seaplane Harbour by your self at your own pace. The Seaplane Harbour, including Seaplane Hangar, was built to become part of Peter the Great’s naval fortress 100 years ago on orders from the Russian emperor Nicholas II. The architecture of the Hangar is remarkable, featuring the world’s first columnless thin-shell concrete domes of such volume. The building was used for seaplanes until the Second World War.