Borum Eshøj is one of the largest Bronze Age mound sites in Denmark. Three graves were found from there dating back to about 1350 BC. The bodies lay in their coffins of hollowed out oak tree trunks in graves that are among the most important prehistoric finds. The oak coffin graves were excavated in the 1870s and are now on show at the National Museum of Denmark. The areas once had more than 40 barrows but most have now gone. The remains of Borum Eshøj are still visible, and recently Moesgård Museum excavated and reconstructed three more of the barrows. A copy of a Bronze Age house has also been built.
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.