On February 23, 303 AD, Roman Emperor Diocletian issued an edict to persecute Christians, resulting in the deaths of thousands. This marked the beginning of the Great Persecution, which lasted until 311 AD.

In 1455, the publication of the Gutenberg Bible began. This was the first book to be printed using a movable type printing press, which revolutionized the world of printing and paved the way for the mass production of books.

On this day in 1821, the Mexican War of Independence officially ended with the signing of the Treaty of Cordoba. The treaty recognized Mexico's independence from Spain, after more than 11 years of fighting.

In 1945, during World War II, the United States Marines and Navy launched an invasion on Iwo Jima, a Japanese island in the Pacific Ocean. The Battle of Iwo Jima lasted for over a month and resulted in the deaths of thousands of soldiers on both sides.

In 1981, a Spanish coup d'état attempt took place, known as 23-F. A group of Spanish Civil Guard officers attempted to overthrow the government, but the coup was ultimately unsuccessful.

Finally, on this day in 2020, the World Health Organization (WHO) reported the first case of COVID-19 in Italy. The virus rapidly spread across the globe, leading to a global pandemic that has had a profound impact on society and the world economy.

In conclusion, February 23 has been a significant day throughout history, marked by events ranging from triumphs to tragedies. Understanding and learning from these events can provide insights into the past and help us to shape a better future.