Looking on the internet deeply has found these results:

in the center of the city is the most popular phrase on the web.

at the center of the city 110,700,000 results on the web	in the center of the city 134,200,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
The center of the city is a university. We we are at the dead center of the city, and They are gathering in the center of the city. I'm going to the center of the city. The core is at the center of the city, several levels down. Just driving into the center of the city and something started to go really weird.	They are gathering in the center of the city. We're in what was the cultural center of the city of Pripyat. I'm going to the center of the city. The center of the city is a university. Just driving into the center of the city and something started to go really weird. Did you know this church is in the exact center of the city? And then you're going to see people start to gather in the center of the city to celebrate the night before, which happens right here. Let's build a big wooden house in the center of the city, so that it'd be close to everyone, buy a samovar and get together, drinking tea

at the center of the city

110,700,000 results on the web

in the center of the city

134,200,000 results on the web

More popular!

The center of the city is a university.
We
we are at the dead center of the city, and
They are gathering in the center of the city.
I'm going to the center of the city.
The core is at the center of the city, several levels down.
Just driving into the center of the city and something started to go really weird.

They are gathering in the center of the city.
We're in what was the cultural center of the city of Pripyat.
I'm going to the center of the city.
The center of the city is a university.
Just driving into the center of the city and something started to go really weird.
Did you know this church is in the exact center of the city?
And then you're going to see people start to gather in the center of the city to celebrate the night before, which happens right here.
Let's build a big wooden house in the center of the city, so that it'd be close to everyone, buy a samovar and get together, drinking tea