Which preposition to use with pisans

in Occurrences 1%

It was in this year that Count Ugolino and his sons and grandsons were starved by the Pisans in their tower prison.

with Occurrences 1%

Carrara provided the Pisans with mellow marble for their Baptistery and Cathedral; Monte Ferrato supplied Pistoja and Prato with green serpentine; while the pietra serena of the Apennines added austerity to the interior of Florentine buildings.

Which preposition to use with  pisans