▁castle ▁of ▁the ▁counts ▁of ▁Pent hi è vre . ▁ ▁Of ▁the ▁other ▁buildings , ▁the ▁church ▁of ▁St ▁Martin ▁( 1 1 th , ▁ 1 6 th ▁and ▁ 1 6 th ▁centuries ) ▁is ▁the ▁chief . ▁ ▁Econom y ▁Lamb alle ▁has ▁an ▁important ▁har as ▁( dep ôt ▁for ▁st all ions ) ▁and ▁car ries ▁on ▁trade ▁in ▁gra in , ▁t anning ▁and ▁le ather - d ress ing ; ▁ear then ware ▁is ▁manufact ured ▁in ▁the ▁en vir ons . ▁ ▁The ▁town ▁of ▁Lamb alle ▁is ▁noted ▁for ▁its ▁exception al ▁week ly ▁market . ▁Although ▁held ▁on ▁Th urs day ▁m orn ings ▁only , ▁this ▁market ▁is ▁known ▁as ▁one ▁of ▁France ' s ▁fin est , ▁with ▁people ▁trav elling ▁from ▁far ▁and ▁wide ▁to ▁visit ▁it ▁and ▁to ▁enjoy ▁its ▁g astr onom ic ▁del ights . ▁According ▁to ▁loc als , ▁something ▁that ▁must ▁be ▁tried ▁here ▁is ▁a ▁local ▁special ity ▁of ▁g alle tt es ▁with ▁sa us ages , ▁apparently ▁ir res ist ibly ▁del icious , ▁and ▁also ▁the ▁Bre ton ▁bu ck w he at ▁p anc akes ▁( G alle tt es , ▁the ▁sweet ▁ones ▁are ▁the ▁cre pes ▁that ▁we ▁are ▁all ▁familiar ▁with ), ▁ ▁c ider ▁and ▁sea fo od ▁for ▁which ▁the ▁area ▁is ▁f amed . ▁ ▁International ▁relations ▁Lamb alle ▁is ▁tw inned ▁with ▁O live ira ▁do ▁B air ro , ▁Portugal ▁