▁the ▁south - east ▁passing ▁through ▁the ▁town ▁and ▁continu ing ▁to ▁Pay z ac ▁in ▁the ▁west . ▁The ▁D 1 2 6 ▁goes ▁north ▁from ▁the ▁town ▁through ▁the ▁length ▁of ▁the ▁commune ▁to ▁join ▁the ▁D 1 4 9 ▁north ▁of ▁the ▁commune . ▁A ▁railway ▁passes ▁through ▁the ▁commune ▁with ▁a ▁railway ▁station ▁at ▁the ▁town . ▁The ▁commune ▁is ▁mixed ▁forest ▁and ▁far ml and . ▁A part ▁from ▁the ▁town ▁there ▁are ▁also ▁the ▁following ▁ham lets ▁in ▁the ▁commune : ▁ ▁Le ▁M ias ▁Le ▁Que y ra ud ▁La ▁Feder ie ▁La ▁P ou rel ie ▁P lais ance ▁Le ▁P uy ▁Ch ate au ▁Arn ac ▁La um on erie ▁Ch ign ac ▁Bo is ▁Red on ▁Les ▁Com bes ▁La ▁For et ▁Bas se ▁P uy ▁Mar mont ▁ ▁The ▁A uv é z ère ▁river ▁passes ▁through ▁the ▁north ▁of ▁the ▁commune ▁flow ing ▁from ▁east ▁to ▁west . ▁Several ▁trib ut aries ▁flow ▁north ▁to ▁join ▁it ▁in ▁the ▁commune . ▁ ▁Ne igh bour ing ▁communes ▁and ▁villages ▁ ▁History ▁Arn ac ▁was ▁inhab ited ▁in ▁Gal lo - R oman ▁times ▁by ▁a ▁land owner ▁named ▁Ar ton ac us ▁or ▁Ar ton os . ▁ ▁Pom pad our ▁belonged ▁to ▁one ▁of ▁the ▁oldest ▁lord ships ▁in ▁Lim ousin : ▁the ▁Last ours , ▁Vic om te ▁de ▁Pom pad our . ▁The ▁first ▁castle ▁was ▁built ▁in ▁ 1 0 2 6 ▁by ▁Guy ▁de ▁Last ours