1) The Taj Mahal, located in Agra, India, is an iconic mausoleum recognized as a UNESCO World Heritage site. It was built in the 17th century by Emperor Shah Jahan as a testament to his love for his wife and stands as a masterpiece of Mughal architecture and a symbol of India's cultural heritage.

2) The French Revolution, which began in 1789, marked a major turning point in European history, leading to the overthrow of the monarchy and the rise of republicanism.

3) The recent increase in cyber attacks, including ransomware attacks targeting critical infrastructure, businesses, and individuals, has highlighted the importance of cybersecurity measures and the need for enhanced protection against evolving threats.

4) The first graphical web browser, Mosaic, was released in 1993 and played a key role in popularizing the World Wide Web.