Dimensions: Height - 50 metres high (187 ft), equivalent to a 12 storey building

Dimensions: Length - 189 metres (615 ft) long

Dimensions: Width - 156 metres 510 ft wide

Dimensions: Outer Circumference. The outer circumference measures 545 metres (1,788 ft)

Dimensions: Centre Arena: The center arena was 287 ft long and 180 ft wide. The arena was covered with 15cm of sand

Dimensions of Arena Wall: 15 ft high

Vaults span between 80 radial walls to support tiers of seating and for passageways and stairs.

The Hypogeum (meaning underground). The hypogeum consisted of two-level subterranean network of tunnels and 32 animal pens. There were 80 vertical shafts provided instant access to the arena for animals and scenery. Large hinged platforms, called hegmata provided access for large animals

Trap Doors in Arena: 36

Retractable Awning - the Velarium. Provided cover and shade: 3 stone brackets in each of the 80 bays. Brackets supported 240 wooden masts on which canvas awnings were hung

Drains were built 8m (26ft) underneath the structure

Foundations under the outer walls and seating were 12-13m (39-42ft) deep

Foundations under the inner ellipse of the arena were 4m (13ft) deep

Seating: 40cm width per spectator and 70cm leg room

Marble used - Approx 100,000 cubic metres

Rows of Seats: 60 -80 Rows of seats

Dimensions of the Different levels of the Colosseum: Level 1 - Ground Level

The first level is 34 ft high and the Doric arches are 23 ft high and 14 ft wide.

Level 2. The second level, in the Ionic "order" or style, is 38 ft high and the arches measure 21 ft high and 14 ft wide

Level 3. The third level, in the Corinthian style, is 37 ft high with the arches being 21 ft high and 14 ft wide.

Level 4. The fourth or top level is 45 ft high and had no arches.