In 1791, Prussian King Frederick William II built the Brandenburg Gate. It has seen various alterations due to damage from military engagements over the centuries.
The Golden Gate, or the Gate of Mercy, has been walled up several times throughout history. According to Jewish tradition, the Messiah will enter Jerusalem through the gate from the Mount of Olives.
The Gateway of India, completed in 1924, was built to commemorate the arrival of King George V and Queen Mary. When India gained independence, the last British troops to leave the country passed through the gate.
The Meridian Gate was built in 1420. It is the southern and largest entrance to the imperial palace. The concave layout with five pavilions arranged on top of the gate signifies imperial dignity.
Commissioned by Napolean in 1806, the Arc de Triomphe stands 49.5 metres tall. However, the gate was completed in 1936. Since then, it has become a focal point of French military parades celebrating historic wins.
Roman Senate commissioned the gate to celebrate Emperor Constantine I's military victory at the Battle of Milvian Bridge. It is the largest Roman triumphal structure at 21 metres high.
Puerta de Alcalá was originally built in 1599 to welcome the wife of King Felipe III. However, it was demolished and rebuilt in 1769 for King Carlos III. It has four statues on top, representing prudence, justice, temperance, and fortitude.
Arco da Rua Augusta, completed in 1873, was built to celebrate Lisbon's reconstruction after the 1755 earthquake.
King Leopold II in 1880 commissioned the arch to celebrate Belgium's independence. The top of the Cinquantenaire Arch features a bronze statue of four horses pulled by a female charioteer holding the national flag.
Designed in 1947 and completed in 1965, the Gateway Arch cost $13 million in the 1960s. It is 192 metres tall and one of the highest monuments in the Western Hemisphere.