▁of ▁vis count ▁and ▁com tor . ▁He ▁built ▁a ▁fort ified ▁monaster y , ▁Sant ▁Pere ▁d ' À ger , ▁which ▁still ▁stands ▁on ▁a ▁hill ▁over looking ▁À ger . ▁ ▁In ▁ 1 0 4 3 – 1 0 4 4 ▁Arn au ▁became ▁a ▁host age ▁on ▁beh alf ▁of ▁his ▁su zer ain ▁Er m eng ol ▁III ▁for ▁ 4 , 0 0 0 ▁solid i ▁to ▁Raymond ▁Ber eng ar ▁I ▁of ▁Barcelona , ▁as ▁ins urance ▁against ▁Er m eng ol ▁and ▁Raymond ▁Ber eng ar ' s ▁al liance ▁against ▁Raymond ▁of ▁C erd anya . ▁Arn au ▁also ▁fought ▁for ▁Raymond ▁Ber eng ar , ▁conqu ering ▁Cam ar asa ▁and ▁Cub ells ▁in ▁his ▁name . ▁As ▁early ▁as ▁ 1 0 5 0 ▁he ▁had ▁extracted ▁from ▁Raymond ▁Ber eng ar ▁a ▁promise ▁not ▁to ▁demand ▁stat ica ▁( right ▁of ▁lod ging ) ▁from ▁him . ▁At ▁the ▁same ▁time ▁he ▁was ▁extract ing ▁other ▁con cess ions ▁out ▁of ▁Er m eng ol ▁III , ▁dimin ishing ▁the ▁com ital ▁rights ▁( pot est as , ▁" power ") ▁over ▁his ▁cast les . ▁ ▁Arn au ▁was ▁a ▁major ▁pro ponent ▁of ▁the ▁Cr us ade ▁of ▁Barb astro ▁in ▁ 1 0 6 4 . ▁On ▁ 1 7 ▁April ▁ 1 0 6 6 ▁Er m eng ol ▁III , ▁who ▁had ▁been ▁given ▁the ▁lord ship ▁of ▁Barb astro ▁after ▁the ▁success ▁of ▁the