Editing Nicaea (section)

===City walls===
[[File:Iznik Wall at Lefke Gate 8274.jpg|thumb|right|İznik Walls at the Lefke Gate]]
The ancient walls, with their towers and gates, are relatively well preserved. Their circumference is {{convert|3100|m|ft|0|abbr=on}}, being at the base from {{convert|5|to|7|m|ft|0|abbr=on}} in thickness, and from {{convert|10|to|13|m|ft|0|abbr=on}} in height; they contain four large and two small gates. In most places they are formed of alternate courses of Roman tiles and large square stones, joined by a cement of great thickness. In some places columns and other architectural fragments from the ruins of more ancient edifices have been inserted. As with those of Constantinople, the walls seem to have been built in the 4th century. Some of the towers have [[Byzantine Greek language|Greek]] inscriptions.<ref name="Comp. pp. 10">Comp. [[William Martin Leake]], ''Asia Minor'', pp. 10, foll.; Von Prokesch-Osten, ''Erinnerungen'', iii. pp. 321,foll.; [[Richard Pococke]], ''Journey in Asia Minor'', iii. pp. 181, foll.; Walpole,'Turkey'[', ii. p. 146; Eckhel, ''Doctr. Num.'' i. pp. 423, foll.; Rasche, ''Lexic. Rei Num.'' iii. l. pp. 1374, foll.</ref>