at Eski Palu The fortress built on top of the castle rock consists of four walled enclosures, each one enclosing a distinct part of the mountain. The outer enclosure occupies the relatively gentle western slope of the castle rock. Above it is the main enclosure. Inside it, at the very highest point of the citadel, is the top enclosure. A fourth enclosure fortifies long rocky outcropping that juts out from the castle rock's west side. The surviving masonry walls and towers all seem to date from the late middle ages. The Urartian inscription of Menua is located on the north side of the outer enclosure, just below a cliff that goes all the way up to the top enclosure. Nearby are a series of rock-cut chambers which, according to local tradition, were the place where
Mesrop Mashtots invented the
Armenian alphabet. A large Christian church is located on the east side of the main enclosure; it was built in the early 1800s. The Ulu Cami, or
congregational mosque, is a simple structure with a long, low profile. The current structure is from the 15th or 16th century, replacing an earlier mosque built under the Artukids. There have since been significant changes to the Ulu Cami since then: for example, its
minaret was built in 1660/61, and an outer courtyard was added in the early 20th century. The
mihrab is dated to 1750/51, and the original wooden
minbar still exists, although the wooden gallery has decayed and partly broken down. The aptly-named Küçük Cami, or "small mosque", is a 10x10 m square with thick walls. Its dome has since collapsed. The large
hammam, or bathhouse, dates from 1659/60 and is well-preserved. From west to east, it had a large changing room, a cold room, and then a hot room. The mosque and
türbe of Cemşid Bey, said to have been a cavalry officer under
Selim I, is located further north and is still in use as a village mosque. The mosque appears to have been built before the türbe, so Cemşid's role in their construction is unclear. Two other old mosques exist in this northern area: the Alacalı Mescit, which was built in either the 16th or early 17th century, and the Merkez Cami, or "central mosque", which was built in 1874. == Notable people ==