| IV ▁Tem pl um ▁Pac is ]] ▁| date = ▁| builder = Tra jan ▁| type = Bas il ica ▁| wiki ▁articles = ▁}} ▁The ▁Bas il ica ▁Argent aria ▁is ▁a ▁port ico ▁with ▁pill ars ▁l ining ▁the ▁Temple ▁of ▁Ven us ▁Gen et rix ▁in ▁the ▁Forum ▁of ▁Ca esar ▁in ▁Rome ▁( Ital y ). ▁The ▁name ▁only ▁appears ▁in ▁late ▁sources ▁of ▁the ▁age ▁of ▁Const antine . ▁ ▁The ▁building ▁was ▁ere cted ▁under ▁Tra jan , ▁with ▁the ▁purpose ▁of ▁adapt ing ▁the ▁s lop es ▁of ▁the ▁Capit oline ▁Hill ▁after ▁the ▁removal ▁of ▁the ▁gap ▁between ▁it ▁and ▁the ▁Qu ir inal ▁Hill . ▁ ▁It ▁was ▁higher ▁than ▁the ▁level ▁of ▁the ▁square ▁and ▁the ▁access ▁was ▁through ▁two ▁st air cases ▁on ▁the ▁south - west ▁end ▁of ▁the ▁port ico . ▁The ▁port ico ▁had ▁two ▁rows ▁of ▁pill ars ▁made ▁of ▁t uff ▁stones ▁and ▁its ▁n aves ▁were ▁covered ▁with ▁bar rel ▁v ault s , ▁partially ▁preserved . ▁As ▁the ▁bas il ica ▁rose ▁in ▁an ▁oblig ated ▁space , ▁it ▁has ▁an ▁irregular ▁drawing , ▁turning ▁round ▁the ▁temple ▁and ▁probably ▁continu ing ▁out ▁of ▁the ▁present ▁ar che ological ▁area , ▁close ▁to ▁the ▁south - west ▁ex ed ra ▁of ▁the ▁Tra jan ' s ▁Forum . ▁ ▁The ▁pl aster ▁covering ▁the ▁back ▁wall ▁ ▁of ▁the ▁building , ▁still ▁preserved , ▁displays ▁several ▁gra ff iti , ▁some ▁of ▁which