The Colosseum had a total spectator capacity of 45,000-55,000.
Los Angeles Memorial Coliseum has a seating capacity of 93,607 people.
23,500 people
O.co Coliseum has a seating capacity of 35,067 people for baseball (standing room for 37,090, expandable to 55,945), 56,057 people for football (expandable to 64,200), and 47,416 people for soccer or 63,132, depending on configuration.
If i remember correctly, it was the Edmonton Gardens, with a seating capacity of about 4000
Rome
The Verizon Center has a seating capacity of 20,356 for basketball and 18,506 for hockey.
If you mean by stadium, an amphitheater, Rome's largest was the Colosseum, having a seating capacity of 50,000. Now here's the tricky part, "stadium" in Latin could refer to a race course. If that's what you mean by the word stadium, it was the Circus Maximus which had a seating capacity of 150,000.
FedExField has a seating capacity of 82,000 people.
There was no charge for entering the Coliseum when I was there.
Coliseum is located in Rome, Italy.
Spartan Stadium has a seating capacity of 75,005 people.
Faurot Field has a seating capacity of 71,168 people.