(532) Justinian I decrees the building of the Hagia SophiaByzantine emperor Justinian I orders a new basilica of grand proportions and precious materials be built in Constantinople. It will endure into the 21st century as one of the great architectural wonders of the world.Hagia Sophia was a Greek Orthodox Christian patriarchal basilica, later an imperial mosque, and now a museum in Istanbul, Turkey. From the date of its construction in 537 AD, and until 1453, it served as an Eastern Orthodox cathedral and seat of the Patriarch of Constantinople, except between 1204 and 1261, when it was converted by the Fourth Crusaders to a Catholic cathedral under the Latin Empire. The building was later converted into an Ottoman mosque from 29 May 1453 until 1931. It was then secularized and opened as a museum on 1 February 1935. Famous in particular for its massive dome, it is considered the epitome of Byzantine architecture and is said to have “changed the history of architecture”. It remained the world’s largest cathedral for nearly a thousand years, until Seville Cathedral was completed in 1520.
Address: Sultanahmet Square, Istanbul Established: Feb 01, 1935 Height: 180 feet (55 m) (Architectural) Architects: Isidore of Miletus · Anthemius of Tralles Architectural style: Byzantine architecture Categories: Basilica · Mosque
wiki/Hagia_Sophia(1455) First book in the West to be printed by moveable typeThe Gutenberg Bible is produced using Johannes Gutenberg’s invention, the moveable type printing press. Forty-eight copies of the original pressing will survive to the 21st century, and be sought after as immensely valuable collectibles.The Gutenberg Bible was the first major book printed using mass-produced movable metal type in Europe. It marked the start of the “Gutenberg Revolution” and the age of the printed book in the West. Widely praised for its high aesthetic and artistic qualities, the book has an iconic status. Written in Latin, the Catholic Gutenberg Bible is an edition of the Vulgate, printed by Johannes Gutenberg, in Mainz, in present-day Germany, in the 1450s. Since its publication, 49 copies have survived, and they are considered to be among the most valuable books in the world even though no complete copy has been sold since 1978. wiki/Gutenberg_Bible
(1836) Battle of the Alamo beginsMexican general Santa Ana leads 1,500 men in a siege against US colonel William Travis’ much smaller Texian force garrisoned behind the walls of the Alamo Mission. The 13-day siege will end in death for all the Texians and inspire calls for vengeance in what will prove a turning point in the Texas Revolution.The Battle of the Alamo was a pivotal event in the Texas Revolution. Following a 13-day siege, Mexican troops under President General Antonio López de Santa Anna launched an assault on the Alamo Mission near San Antonio de Béxar, Texas, United States, killing all of the Texian defenders. Santa Anna’s cruelty during the battle inspired many Texians—both Texas settlers and adventurers from the United States—to join the Texian Army. Buoyed by a desire for revenge, the Texians defeated the Mexican Army at the Battle of San Jacinto, on April 21, 1836, ending the revolution.
Start date: Feb 23, 1836 End date: Mar 06, 1836
wiki/Battle_of_the_Alamo(1954) Mass polio vaccine inoculations startPittsburgh elementary school students are the first group to receive Dr. Jonas Salk’s new polio vaccine. The disease that for centuries has paralyzed and killed millions will be almost eradicated by the end of the 20th century.Polio vaccines are vaccines used to prevent poliomyelitis. There are two types: one that uses inactivated poliovirus and is given by injection, and one that uses weakened poliovirus and is given by mouth. The World Health Organization recommends all children be vaccinated against polio. The two vaccines have eliminated polio from most of the world, and reduced the number of cases each year from an estimated 350,000 in 1988 to 74 in 2015.
Developers: Jonas Salk · Albert Sabin May prevent: Polio (poliomyelitis) Drug class: Vaccine Pregnancy risk category: C