The observatory's origins predate the hill at Kandilli. It was established in 1868, during the late Ottoman period, on the European side of Istanbul — the Rumelian shore — and given the grandiose title of Imperial Observatory. Its original mandate was practical rather than purely scientific: accurate timekeeping for the empire, and weather forecasting for a city whose geography made meteorology essential. The observatory served these purposes for four decades, long enough to develop a modest but real scientific program. Then the political upheaval of 1909 interrupted everything. The rebels who destroyed it were not targeting science; they were fighting for or against the constitutional revolution sweeping the empire. But science suffered the consequences.

The move to Kandilli transformed the institution. The new site offered something the Rumelian location could not: a commanding view of the Bosphorus, clear skies above the Asian hills, and, crucially, a geographic position at the seismic crossroads of Anatolia. Over the following decades, the observatory's focus evolved. Weather forecasting and astronomy remained; seismology was added and eventually came to define the institution's identity. The name changed several times over the years. In 1940 it became the Kandilli Observatory, Astronomy and Geophysics — an acknowledgment of the broadening scope. In 1982, when the observatory was annexed to Boğaziçi University, its institutional life entered a new chapter. The current name, Kandilli Observatory and Earthquake Research Institute — abbreviated KOERI — captures what it has become.

Today, KOERI is Turkey's primary center for monitoring and studying seismic activity. On the Kandilli campus, the observatory runs departments in earthquake engineering, geodesy, and geophysics, alongside laboratories for astronomy, geomagnetism, meteorology, and optics. A National Earthquake Monitoring Center sits within the campus, as does a Disaster Preparedness Education Unit, a Sun Tower, and an Institute for Biomedical Engineering. Outside the campus, KOERI operates remote monitoring stations — including the Belbaşı Nuclear Tests Monitoring Center in Ankara Province and a center for reducing earthquake damage in Iznik, in Bursa Province. The scope is considerable. This is not a museum piece but a working institution, tracking the movements of a fault system that runs beneath one of the world's great cities.

Standing on the Kandilli hillside, you can see both shores of the Bosphorus — Europe to the west, Asia below your feet. The strait narrows here, and on clear days the minarets of the Old City are visible through the haze to the southwest. It is a place from which the geography of Istanbul becomes suddenly comprehensible: the water dividing the continents, the city sprawling across both banks, the hills of Anatolia rising behind you. For an observatory that began by tracking stars for an empire and now listens for the tremors that could undo a metropolis, the view feels appropriate. The earth that KOERI monitors is the same earth on which Istanbul was built, and the two cannot be separated.