On Sunday, July 21, 2013 King Albert abdicated and was replaced by his son, the new King Phillippe I . No foreign royals were present as King Albert had only announced his intentions a few weeks before. There was little time for elaborate preparations, though there was a parade as Sunday was National Day in Belgium. The new king, like his father, is a strong supporter of the European Union. The first Belgian king ascended the throne on July 21, 1831.

An excellent article that puts the royal ascension into the context of the current political situation can be found at the following link:

https://www.bloomberg.com/news/2013-07-03/belgium-s-king-albert-steps-down-seeking-unity-in-divided-nation.html