President William Ruto says a prayer at the Western Wall in Jerusalem, Israel. [PCS]

The Western Wall, also known as the Wailing Wall, is the last remnant of the Holy Temple of Jerusalem, which was destroyed by the Romans.

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It is considered one of the holiest sites in Jerusalem, attracting thousands of people of all faiths who go there to recite their prayers.

Jews who live in Jerusalem pray facing the wall three times a day and are often in tears, hence the name "Wailing Wall." The wall is divided into two sections, one for males and the other for females.

Believers at the wall usually leave a written prayer on pieces of paper on the cracks of the ancient stones, and the notes are collected twice a year by the Rabbi and buried at Mount Olives in Jerusalem.

 First Lady Rachel Ruto prays at the Western Wall in Jerusalem, Israel.

The wall is lined with people deep in prayer at most hours of the day, many leaning forward and touching their foreheads to the stones.

The wall holds an important position within ancient Jewish prophecies, including the belief that the Holy Temple will eventually be reconstructed, standing upon the Temple Mount surrounded by the wall.

Raila Odinga, the leader of Azimio la Umoja, visited the Western Wall five years ago ahead of the presidential elections.

Like Ruto, Odinga wrote a wish on a piece of paper, stuck it on the wall, and said a prayer.