22 May, 2012 – The world's tallest tower is opened to the public

At 643 meters (2080 feet), the Tokyo Skytree in Japan's capital city is also the second tallest structure in the world after Burj Khalifa in Dubai. Its prime purpose is relaying TV and radio signals.

23 May, 1951 – Delegates of the Dalai Lama sign the Seventeen Point Agreement

The contract affirmed Chinese sovereignty over Tibet. According to Tibetan officials, the document was signed under duress and is, therefore, invalid.

24 May, 1830 – Mary had a Little Lamb is published

Sarah Josepha Hale's poem is one of the best-known English language nursery rhymes.

25 May, 1963 – 32 African countries form a coalition against white rule

The Organisation of African Unity was founded to promote decolonisation and end white minority governments in Africa. The OAU was replaced by the African Union in 2002.

26 May, 1908 – Engineers make the first major oil find in the Middle East

The discovery in Masjed Soleyman in Iran had a major impact on the country's and the world region's economy and politics. More than half of the world's oil reserves are located in the Middle East.

27 May, 1937 – The Golden Gate Bridge is opened

The suspension bridge connecting San Francisco peninsula with Marin County is one of the most recognised works of United States architecture.

28 May, 1998 – Pakistan detonates five atom bombs

The nuclear tests came as a response to India's tests just days earlier. Fearing a devastating conflict between the two nuclear powers, a number of countries imposed economic sanctions.