Which is bigger, Colosseum or Taj Mahal?

Taj Mahal is 1.5× Colosseum on height. Both figures are typical values; the full range for each is in the table above.

How do Colosseums and Taj Mahals compare on width?

Colosseum: 156 m. Taj Mahal: 57 m. Colosseum is 2.7× Taj Mahal on width.

How do Colosseums and Taj Mahals compare on area?

Colosseum: 24,000 m². Taj Mahal: 170,000 m². Taj Mahal is 7.1× Colosseum on area.

Colosseum vs Taj Mahal

Taj Mahal is larger on height

Taj Mahal is 1.5× Colosseum on height.

Colosseum and Taj Mahal can be compared on 3 measures. The figures below are typical adult or full-size values, with the larger of the two in bold.

Side by side

Larger value in bold. Ranges reflect genuine variation, not uncertainty.
	Colosseum	Taj Mahal
Height	48 m	73 m
Width	156 m	57 m
Area	24,000 m²	170,000 m²

What the numbers say

Taj Mahal is 1.5× Colosseum on height.
Colosseum is 2.7× Taj Mahal on width.
Taj Mahal is 7.1× Colosseum on area.

Height compared.

Taj Mahal 73 m

Colosseum 48 m

Colosseum

The largest amphitheatre ever built, completed in Rome in AD 80.

Taj Mahal

A white marble mausoleum in Agra, completed in 1653 for the wife of the Mughal emperor Shah Jahan.

This is a comparison of published measurements, nothing more. It describes how two things differ on measures that have been recorded; it does not predict how they would fare against each other in any situation.

Common questions

Which is bigger, Colosseum or Taj Mahal?: Taj Mahal is 1.5× Colosseum on height. Both figures are typical values; the full range for each is in the table above.
How do Colosseums and Taj Mahals compare on width?: Colosseum: 156 m. Taj Mahal: 57 m. Colosseum is 2.7× Taj Mahal on width.
How do Colosseums and Taj Mahals compare on area?: Colosseum: 24,000 m². Taj Mahal: 170,000 m². Taj Mahal is 7.1× Colosseum on area.

Sources

Wikidata — Wikimedia Foundation (CC0 1.0)

How these figures are compiled and checked