Saqqara served as capital of Egypt, Saqqara remained in use as a burial ground for nobles. Moreover, the area became an important destination for pilgrims to a number of cult centres. Activities sprang up around the Serapeum, and extensive underground galleries were cut into the rock as burial sites for large numbers of mummified ibises, baboons, cats, dogs, and falcons. Saqqara and the surrounding areas of Abusir and Dahshur suffered damage by looters during the 2011 Egyptian protests. Store rooms were broken into, but the monuments were mostly unharmed. During routine excavations in 2011 at the dog catacomb in Saqqara necropolis,
Noin-Ula burial site on a piece of wood ('ke-mu'), and they also mention a "Hu script". At Noin-Ula and other Xiongnu burial sites in Mongolia and the region north of Lake Baikal, among the objects were discovered over 20 carved characters. Most of these characters are either identical or very similar to letters of the Old Turkic alphabet of the Early Middle Ages found on the Eurasian steppes. From this, some specialists conclude that the Xiongnu used a script similar to the ancient "Eurasian runiform", and that this alphabet was a basis for later Turkic writing. The Noin-Ula burials were intensively studied, but