Which preposition to use with cahors

in Occurrences 3%

Henry II., having taken Cahors in 1154, left his chancellor, Becket, there as governor.

with Occurrences 1%

Nowadays it is the Fountain of Divona that supplies Cahors with water.

at Occurrences 1%

She began now to regret that she had not gone down to the house party of Madeleine de Cahors at Alenon.

by Occurrences 1%

What a feat of war was that capture of Cahors by Henry with only 1,400 men, after almost incessant fighting in the streets for five days and nights!

until Occurrences 1%

The next day brought me to the end of my long journey down the valley of the Lot, for I had decided to leave the country below Cahors until some future day.

Which preposition to use with  cahors