A 10th-century Description
This description is from Muqaddasi, an Arab geographer from Jerusalem who wrote in the 10th century.
Baghdad is the metropolis of Islam, and within it is Madinat al-Salam [the City of Peace]. Its people have distinctive characteristics of wittiness, charm, refinement, and correct scholarship. The climate is mild, and all that is good and beautiful is to be found there. Every heart yearns for it; every battle is fought over it, and every hand is raised to defend it. It is too renowned to need description, more glorious than we could possibly portray it, and indeed beyond praise.
Abu l-‘Abbas al-Saffah founded it, then al-Mansur built in it the City of Peace, and the caliphs after him added to it….
However, the authority of the caliphs declined, the city deteriorated, and the population dwindled. The City of Peace is now desolate: the Mosque alone is frequented on Fridays, and otherwise the whole place is deserted… Day by day the town is going from bad to worse: truly, I fear it will become like Samarra, what with the corruption, the ignorance and immorality, and the outrageous oppression of the ruler.
Source, p. 100.
A 12th-century Depiction
This map is in a 12th-century copy of Ibn Hawqal’s 10th-century geography. It shows Iraq with the large red circle to represent Baghdad on the river.

A 12th-century Description
This passage is from Yaqut, a famous geographer who wrote a geographical dictionary in the 12th century.
The city of Baghdad formed two vast semi-circles on the right and left banks of the Tigris, twelve miles in diameter. The numerous suburbs, covered with parks, gardens, villas and beautiful promenades, and plentifully supplied with rich bazaars, and finely built mosques and baths, stretched for a considerable distance on both sides of the river. In the days of its prosperity the population of Baghdad and its suburbs amounted to over two millions! The palace of the Caliph stood in the midst of a vast park several hours in circumference which beside a menagerie and aviary comprised an inclosure for wild animals reserved for the chase. The palace grounds were laid out with gardens, and adorned with exquisite taste with plants, flowers, and trees, reservoirs and fountains, surrounded by sculptured figures. On this side of the river stood the palaces of the great nobles. Immense streets, none less than forty cubits wide, traversed the city from one end to the other, dividing it into blocks or quarters, each under the control of an overseer or supervisor, who looked after the cleanliness, sanitation and the comfort of the inhabitants.
The water exits both on the north and the south were like the city gates, guarded night and day by relays of soldiers stationed on the watch towers on both sides of the river. Every household was plentifully supplied with water at all seasons by the numerous aqueducts which intersected the town; and the streets, gardens and parks were regularly swept and watered, and no refuse was allowed to remain within the walls. An immense square in front of the imperial palace was used for reviews, military inspections, tournaments and races; at night the square and the streets were lighted by lamps.
There was also a vast open space where the troops whose barracks lay on the left bank of the river were paraded daily. The long wide estrades at the different gates of the city were used by the citizens for gossip and recreation or for watching the flow of travelers and country folk into the capital. The different nationalities in the capital had each a head officer to represent their interests with the government, and to whom the stranger could appeal for counsel or help.
Baghdad was a veritable City of Palaces, not made of stucco and mortar, but of marble. The buildings were usually of several stories. The palaces and mansions were lavishly gilded and decorated, and hung with beautiful tapestry and hangings of brocade or silk. The rooms were lightly and tastefully furnished with luxurious divans, costly tables, unique Chinese vases and gold and silver ornaments.
Both sides of the river were for miles fronted by the palaces, kiosks, gardens and parks of the grandees and nobles, marble steps led down to the water’s edge, and the scene on the river was animated by thousands of gondolas, decked with little flags, dancing like sunbeams on the water, and carrying the pleasure-seeking Baghdad citizens from one part of the city to the other. Along the wide-stretching quays lay whole fleets at anchor, sea and river craft of all kinds, from the Chinese junk to the old Assyrian raft resting on inflated skins. The mosques of the city were at once vast in size and remarkably beautiful. There were also in Baghdad numerous colleges of learning, hospitals, infirmaries for both sexes, and lunatic asylums.