On his shoulders was its prayer and its exit. The system had abandoned it, corruption had entered, and strife prevailed.

This was due to increased taxes and unjust judgments. So he began to reduce taxes and dig canals, and the land flourished, its yield increased, and the farmer and the merchant became satisfied. Order was restored, security prevailed, and the revenue reached fifty percent of what entered Egypt, which was a jewel.

When Jawhar saw the strength of the Egyptian lands and the abundance of its wealth, he was not satisfied with Fustat as the capital. So he set out to build a new city, making it the base of the Egyptian province, which he called Al-Qahira. Building cities was a common practice among the kings of Islam at that time. They would build cities and move their capitals, and most often the reason for building them was to make them a fortress for their kings and soldiers, and then to build walls for the people.

The capital of the Egyptian kingdom during the time of the Pharaohs was Memphis, then it was replaced by Ity-tawy, then by others, and so on until the time of the Greeks, when it was replaced by Alexandria. When the Muslims came, they built Fustat. Until the Tulunid state, Fustat was somewhat monopolized by the army and land grants, until Jawhar the commander came. He desired to immortalize his memory and the memory of his master, so he set out to build the Fatimid capital to compete with Baghdad, the capital of the Abbasids.

The construction of Al-Qahira Al-Mu'izziya.

Jawhar began the construction of Al-Qahira, and he marked out a piece of land where he had encamped in the year when he came to conquer Fustat. He descended to the plain and the canal. This spot was sandy, and what Jawhar found there were only a few gardens, including the garden of Ikhshidi Kafur east of the canal, the ميدان الاخشيد (Meydan Al-Ikhshidi), and a monastery for Christians called the Monastery of Bones, in which there was a well known as the Well of Bones, which the common people called the Well of the Greatness. In that area, there was a place known as Qasr Al-Shawk (Palace of Thorns), which later became known as Qasr Al-Shawk after the construction of Al-Qahira. So Jawhar ordered the construction of Al-Qahira in that place and built two palaces, one larger than the other, known as the Great Palace and the Small Palace, which he made for the residence of Al-Mu'izz upon his arrival in Egypt. Its current location is the well-known legal court, Bait Al-Qadi, which is connected to the street of the coppersmiths.

Al-Qahira was completed in about three years (in 560 AH). It was built in the late year of 560 AH.

Walls were built around it, and it had gates. Some of its remnants still exist to this day. So Jawhar sent to his master Al-Mu'izz. So he abandoned Al-Mansuriya, which his father had built, and set out for his new capital, taking with him his minister from Ifriqiya, Yusuf bin Ziri. So he embarked on a naval expedition to the island of Sardinia, and from there to Sicily, where he stayed for a few months inspecting its affairs, then he set out from there to Tripoli in the West, then to Alexandria.

He arrived in Alexandria and then went to Al-Qahira.