India’s most famous tourist attraction turns 350 this year, and quite understandably, it’s tired:

Earlier this month, two Indian historians warned the Taj Mahal may already be tilting and could crumble or sink if the government did not pay immediate attention to its ecological setting.

“Dangerous tilts in its minarets, first noticed in 1942 and mentioned in various reports, have continued to increase over the years,” Ram Nath, a former head of history at Rajasthan University, told the Hindustan Times.

“They are caused by the dry river bed.”

Another historian, Agam Prasad Mathur, said the dry Yamuna river bed must once again be filled if the monument was to be saved.

“Yamuna used to be full of water to maintain the monument’s balance and absorb tectonic shocks. Now that the river bed is dry, the Taj is exposed to the elements,” he said.

Mughal emperor Shah Jahan constructed the Taj in memory of his favourite wife, Mumtaz Mahal, who died during childbirth. According to the BBC article that was linked above, this threatened “symbol of love” attracted over three million tourists to Agra last year.