Notre-Dame fire
On 15 April 2019, just before 18:20 CEST, a structural fire broke out in the roof space of Notre-Dame de Paris, a medieval Catholic cathedral in Paris, France. By the time the fire was extinguished, the cathedral's spire had collapsed, most of its roof had been destroyed, and its upper walls were severely damaged.
Hillsborough disaster
One of the worst sports disasters took place at Hillsborough Stadium in Sheffield, South Yorkshire, England. It occurred during an FA Cup semi-final between Liverpool and Nottingham Forest, when a massive influx of fans resulted in overcrowding two standing-only central pens and a fatal human crush. With 97 deaths and 766 injuries, it has the highest death toll in British sporting history.
1979 Montenegro earthquake
The 1979 Montenegro earthquake occurred on 15 April at 06:19 UTC with a moment magnitude of 6.9 and a maximum Mercalli intensity of X (Extreme). It was the most devastating earthquake in SR Montenegro, then part of Yugoslavia.
Northbound Chesapeake Bay Bridge-Tunnel opened
The Chesapeake Bay Bridge-Tunnel (CBBT, officially the Lucius J. Kellam Jr. Bridge-Tunnel) is a 17.6-mile (28.3 km) bridge-tunnel that crosses the mouth of the Chesapeake Bay between Delmarva and Hampton Roads in the U.S. state of Virginia. It opened in 1964, replacing ferries that had operated since the 1930s. With 12 miles (19 km) of bridges and two one-mile-long (1.6 km) tunnels, the CBBT is one of only 14 bridge-tunnel systems in the world and one of three in Hampton Roads.
Robert W. Gore was born
Robert W. Gore was American engineer and scientist, inventor and businessman. His most significant breakthrough was the invention or Gore-Tex.
City of San Francisco was incorporated
By act of the Legislature, San Francisco was incorporated as a City on April 15th, 1850. Its population grew rapidly as the California Gold Rush brought a constant flood of treasure seekers. That same year, California was granted statehood.
Leonhard Euler was born
Leonhard Euler was a Swiss mathematician, physicist, astronomer, geographer, logician and engineer who founded the studies of graph theory and topology and made pioneering and influential discoveries in many other branches of mathematics such as analytic number theory, complex analysis, and infinitesimal calculus. Euler is held to be one of the greatest mathematicians in history and the greatest of the 18th century.
