The Pskov state historical, architectural and art museum, opened in 1876, is one of the oldest museums of Russia. It comprises three separate museums and a wide range of displays. The 2nd floor of the new building houses the war collection, with photos and artefacts from WWII, as well as information on more recent conflicts like Afghanistan and Chechnya. More interesting is the 1st-floor picture gallery, which has works from the 18th, 19th and 20th centuries, including paintings by Nikitin, Tropinin and Zhukovsky, as well as representations from the Russian avant garde, including a couple of Petrov-Vodkins.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.