La chabola de la Hechicera (Sorginaren Txabola, 'The Witch's Hut') is a dolmen group located in Elvillar. Three large vertical stones support a large horizontal flat stone. Nine large stones form a chamber in a polygonal shape. The corridor is made of five stones, and is divided into two. The site was probably a funerary construction to hold the remains of the people in the settlement.
It was discovered in 1935 by Álvaro de Gortázar in a fair state of preservation. Jose Miguel Barandiaran explored it partially in 1936, finding two stone percutors, a polished axe of ophite, fragments of pottery and human remains. The stone lying on top was found broken into three parts, but it was restored and replaced in its original position. The findings are preserved in a museum in nearby Laguardia, Álava.
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.