The Kyiv Pechersk Lavra monastery, a symbol of Ukrainian spiritual and cultural history whose golden domes have towered over the capital for almost a millennium, was set ​ablaze on Monday during a Russian attack, Ukrainian authorities said.

Here are some facts ‌about the monastery, a UNESCO World Heritage site:

ITS HISTORY DATES BACK TO 11TH CENTURY

A grand complex with striking belltowers, resplendent churches, chapels, gates and seminary buildings, the Lavra was founded by monks near ​the Dnipro river in 1051.

The first historian of Ukraine, Nestor the Chronicler, lived ​and worked at the monastery. Over the next centuries, the monastery emerged ⁠as a leading spiritual centre of Kyivan Rus, where chroniclers, icon painters and physicians ​worked, fostering the development of education.

The complex grew to become the main sacred site of ​Orthodox Christianity in eastern Europe. A short drive from Kyiv’s bustling city centre, it continues to draw large numbers of worshippers and tourists.

A firetruck ladder reaches towards the dome of a church, where smoke is rising against a cloudy sky.

SPRAWLING COMPLEX

The complex, whose name means “monastery of the caves”, occupies more than ​20 hectares and has more than 100 buildings, housing several churches and chapels. Six ancient ​underground churches are located in the caves of the monastery. It also houses several museums.

CAVES

The monastery comprises ‌a ⁠network of surface and underground churches dating from the 11th to the 19th centuries, set within a labyrinthine cave complex extending over 600 metres.

Home to monks for centuries, the caves were dug into Dnipro hills between 5 and 15 metres deep.

The bodies of monks ​rest within the monastery’s ​caves, including the first ⁠monk to inhabit the caves, St Anthony.

DORMITION CATHEDRAL SET ON FIRE

A Russian strike set fire to the roof of the Dormition Cathedral, ​the main cathedral of the monastery complex, Ukrainian officials said.

The cathedral, ​whose history ⁠also dates back to the 11th century, served as a necropolis for the medieval princes of Kyiv. It was also badly damaged during World War Two.

“This strike on the Lavra is ⁠an ​attack on the Christian community and on the cultural ​heritage of humanity,” Zelenskiy said, adding that the site would be fully restored.

Russia denied striking the cathedral, saying it had ​been damaged by a U.S.-made Patriot air defence missile.

A church building at night engulfed in flames and smoke, with emergency response vehicles visible below.