Wireless connection (around 500m) between 2 buildings ?

Hi,
I'm trying to install a wireless connection between 2 buildings.
Tthere is around 500m between the 2 buildings...
I don't know if with Cisco is it possible to do this ? If it is possible, which models of AP's can I use ? Which antennas ?
Thanks for your feedback,
Alexis

Do you have direct line-of-sight between the two buildings? 
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