The Horde developed as a sedentary rather than nomadic culture, with Sarai evolving into a large, prosperous metropolis. In the early 14th century, the capital was moved considerably upstream to Sarai Berqe, which became one of the largest cities of the medieval world, with 600,000 inhabitants. Sarai was described by the famous traveller Ibn Battuta as "one of the most beautiful cities ... full of people, with the beautiful bazaars and wide streets", and having 13 congregational mosques along with "plenty of lesser mosques". Another contemporary source describes it as "a grand city accommodating markets, baths and religious institutions". An astrolabe was discovered during excavations at the site and the city was home to many poets, most of whom are known to us only by name.