Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
The city in a dream indicates a scholar or a ruler. A prosperous city indicates a scholar who acts upon his knowledge. A ruined city indicates a scholar who does not act upon his knowledge or an unjust ruler.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The city indicates the world. Entering an unknown city indicates the approach of death for the sick. Building a city indicates the gathering of scholars and righteous people.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
The city is interpreted as the king and the scholar. A fortified city indicates security and invincibility. Whoever sees himself moving from one city to another, his situation will change.