The Gothenburg quadricentennial jubilee (Swedish: Göteborg 2021) was originally scheduled to be held in Gothenburg, Sweden, in 2021 to celebrate the 400th anniversary of the city. Due to the ongoing COVID-19 pandemic in Sweden, organizers have postponed the celebrations to 2023, while a small-scale event will still take place in 2021. The anniversary follows the city's tricentennial jubilee held in 1923 (which was intended to be held in 1921, but was delayed due to World War I). The city was granted its founding royal charter in 1621, by King Gustavus Adolphus.

The 500 Most Influential Muslims (also known as The Muslim 500) is an annual publication first published in 2009, which ranks the most influential Muslims in the world. The publication is compiled by the Royal Islamic Strategic Studies Centre in Amman, Jordan. The report is issued annually in cooperation with Prince Al-Waleed Bin Talal Center for Muslim-Christian Understanding at Georgetown University in the United States. Turkey's President Recep Tayyip Erdoğan took first place in the 2021 edition. He was followed by King Salman of Saudi Arabia, Iranian Supreme Leader Ali Khamenei, and the Abdullah II of Jordan. Pakistani scholar Muhammad Taqi Usmani, King Mohammed VI of Morocco, Emirati Crown Prince Mohammed bin Zayed Al Nahyan, Iraqi cleric Ali al-Sistani, Yemeni scholar Umar bin Hafiz and Saudi Arabian cleric and scholar Salman al-Ouda are also among the top 10 list.
The 500 Most Influential Muslims (also known as The Muslim 500) is an annual publication first published in 2009, which ranks the most influential Muslims in the world. The publication is compiled by the Royal Islamic Strategic Studies Centre in Amman, Jordan. The report is issued annually in cooperation with Prince Al-Waleed Bin Talal Center for Muslim-Christian Understanding at Georgetown University in the United States.