He told the "Vatican News" portal at the weekend: "The Holy Year has been a great help for us. After difficult years, the Jubilee Year has given us the opportunity to fundamentally improve things."
As examples, he cited hundreds of new buses and the comprehensive renovation of the Roman underground and trams.
With the cooperation now practised between the state, the municipality and the Vatican, he now wants to tackle further projects.
These include a metro line that also includes the Vatican and Castel Sant'Angelo.
This should be realised by the next Holy Year, which is expected to take place in 2033.
The left-wing democrat Gualtieri also emphasised that the Holy Year 2025 had also brought social and infrastructure improvements for Rome's disadvantaged peripheral areas and the people living there.
Pope Francis had expressly wanted this.
That is why the great pilgrimage event will be remembered fondly by the entire city of Rome.