Constantinople (Istanbul) has always been threatened by destructive earthquakes which in the past have destroyed the city more than once. Research over the years has shown that the city has been rocked by more than 1000 major earthquakes between 330-1920 AD. While some of them were earthquakes which occurred due to fault lines around the city and caused heavy damage, many of them were caused by fault lines in areas of Thrace and İzmit-Düzce and caused less destruction. Twenty years after the Roman Emperor Constantine I, known as Constantine the Great, founded Constantinople, an earthquake occurred in the east of the city on September 25th 342 AD, but it didn't cause much damage. On August 24, 358, the earthquake that brought İzmit down also affected the ancient city of Constantinople. The earthquakes that hit Constantinople in 402, 412, 417, 423, 437 and 442 caused considerable damage to the city, but not as much as the earthquake of 358. The city continued to be shaken in 450, 477, 487, 525 and and 533 also. The earthquake that struck the city on August 16, 542 was massive; many houses, ramparts and statues were demolished and thousands of people died. The damage caused by an earthquake on May 7, 558 following the earthquakes of 546 and 557 was substantial. The main earthquake in December was of unprecedented ferocity and "almost completely wiped out" the city. It caused damage to Hagia Sophia that contributed to the collapse of its dome the following year, as well as damaging the walls of Constantinople as the Hun invaders were able to easily penetrate it the following season. After the earthquakes of 583 and 611, Constantinople has long been free from earthquakes. The Constantinople 740 earthquake occurred on October 26, near Constantinople and the Sea of Marmara. In Constantinople, the earthquake caused the collapse of many public buildings. The walls of Constantinople were also damaged. The victims in Constantinople are said to have included more than 1,000 people. The earthquake is said to have destroyed a number of towns in Thrace. It also damaged the cities of Nicaea (İznik), Nicomedia (İzmit) and Praenetus. On March 1, 1202, an earthquake occurred in the city which caused the floor in front of the Byzantine Emperor's bed to crack open and an agha of the House of Felicity died by falling into the hole. On June 1, 1296, a big earthquake hit the capital in the night. Historians write that Constantinople was leveled to the ground in this earthquake. Houses, palaces, churches and city walls were demolished. Floods occurred, and aftershocks continued for two months. On Sept. 10, 1509, Constantinople was shaken by a big quake at 4 in the morning. Before the people understood what was happening, the whole city was destroyed; 109 mosques and over 1070 state houses disappeared completely. According to experts, the earthquake in 1509 was the biggest one in the Eastern Mediterranean after the year 1000. It was felt in the area from Bolu province to Edirne province. It was called "Little Doomsday." On May 22, 1766. The shake, which started half an hour after sunrise on that day, was the third day of Qurban Bayram. Scary noises were heard during the quake, and a two-minute-long shake followed them. Then, a less intense quake hit the city for four minutes. The aftershocks of this quake continued for eight minutes. Enough shaky news for now. Let's talk about the monetary workshop in this city: The mint Around 326 AD the imperial mint started its production. It is possible that the staff and the equipment of the new workshop were imported from Ticinum , whose mint would disappear to give rise to that of Constantinople. The excellent quality of the first Constantinople issues is due definitely to having inherited the knowledge of one of the most virtuous workshops among those established as a result of Diocletian's monetary reform. The production of the Constantinople mint was always very high and coins were struck in gold, silver and bronze. At the beginning, the mint opened with only two officinae, but after the execution of Crispus and Fausta, a third was added. At the New Year, 327 AD, the number of officinae in use was seven. Finally, when the GLORIA EXERCITVS coinage began, soon after the Dedication of the city in May 330 A.D., a total of eleven officinae was employed. The eleven officinae for bronze continued for the period 346-360 A.D., when these were reduced to four under Julian the Apostate and Jovian. In the first issue for Valentinian and Valens this was increased to five and in the second issue to seven. For the rest of the century the number fluctuated between seven and four, but from the early fifth century onwards the officinae did not normally sign their products. In the case of some issues between 383 and 392 the officinae were differentiated for the various rulers. The mint will continue emitting coins throughout the long byzantine period, remaining quite high the coinage volume and its variety. On the day the city was shaking,please show me your Constantinopolitan coins !