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1.Is the most populous one.
Italy
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Spain
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France
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United Kingdom
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As of 2019, UK has passed France according to this source.
2.Was once in the hands of the Muslims.
France
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Spain
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Italy
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United Kingdom
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The whole Iberian peninsula was in the Umayyad hand except the northern parts. It wasn't until 1492 the Emirate of Granada fell into Catholic monarchs.
3.Is the most visited country in the world.
United Kingdom
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France
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Italy
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Spain
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86.9 mil. people visited France in 2017.
4.Had the least amount of colonies.
Italy
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France
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United Kingdom
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Spain
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5.Has the largest economy of them all (in the nominal method).
France
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United Kingdom
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Italy
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Spain
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France is only a hundred thousand US dollars behind UK.
6.Most of world's UNESCO World Heritage Sites are in here.
United Kingdom
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France
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Spain
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Italy
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54 sites for Italy, Spain is in the 2nd place with 47 sites.
7.Is the largest producer of wine.
United Kingdom
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Italy
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Spain
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France
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Italy leads the rank with France and Spain coming in 2nd and 3rd.
8.Its national animal is bull.
Spain
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Italy
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France
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United Kingdom
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9.Was the first to abolish slavery.
Spain
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United Kingdom
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Italy
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France
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UK did not abolished the practice of slavery
10.Has two other countries inside itself.
United Kingdom
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Spain
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France
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Italy
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San Marino and Vatican City are inside Italy
11.Its capital city's Roman name was "Lutetia".
France
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United Kingdom
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Italy
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Spain
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12.The oldest building still under construction is located in here.
United Kingdom
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France
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Spain
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Italy
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Located in Barcelona, Sagrada Família's construction started in 1882 and is still unfinished.
13.Its highest point is the lowest one among the others.
France
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Italy
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United Kingdom
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Spain
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14.First country to introduce the license plate.
United Kingdom
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France
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Italy
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Spain
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15.Was neutral during the WWII.
Spain
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France
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Italy
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United Kingdom
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16.Has the shortest coastline of them all.
Spain
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Italy
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United Kingdom
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France
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17.Its alliance with Portugal is the world's oldest.
Italy
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France
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United Kingdom
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Spain
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18.Has the highest life expectancy.
Spain
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France
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Italy
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United Kingdom
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19.The only country to NOT name itself on its stamps.
Spain
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Italy
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United Kingdom
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France
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20.The largest anti-war rally took place.
France
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Italy
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United Kingdom
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Spain
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In 2003 the protest involved around 3 million people that protested against the Invasion of Iraq.