▁been ▁developing ▁the ▁idea ▁of ▁a ▁new ▁series ▁based ▁on ▁The ▁Three ▁Mus k ete ers ▁since ▁as ▁far ▁back ▁as ▁ 2 0 0 7 , ▁when ▁the ▁project ▁was ▁en vis aged ▁as ▁a ▁Saturday ▁evening ▁show ▁to ▁run ▁between ▁series ▁of ▁Doctor ▁Who . ▁The ▁event ual ▁production ▁of ▁the ▁series ▁was ▁finally ▁announced ▁in ▁ 2 0 1 2 , ▁with ▁Ad rian ▁H od ges ▁in ▁charge ▁of ▁the ▁project . ▁ ▁Fil ming ▁Paris ▁was ▁not ▁considered ▁as ▁a ▁film ing ▁location ▁because ▁over ▁the ▁dec ades , ▁development ▁had ▁det ract ed ▁from ▁the ▁g ritt ier ▁architecture ▁wanted . ▁Dublin ▁was ▁also ▁considered ▁before ▁sett ling ▁on ▁the ▁Czech ▁Republic , ▁which ▁suffered ▁little ▁damage ▁during ▁the ▁two ▁world ▁wars . ▁Many ▁historic ▁buildings ▁were ▁int act ▁and ▁priv ately ▁owned ▁stat ely ▁homes ▁were ▁r ented ▁for ▁film ing . ▁ ▁Fil ming ▁for ▁the ▁series ▁took ▁place ▁mainly ▁in ▁D oks any , ▁ 3 0 ▁kilometres ▁north - west ▁of ▁Prag ue , ▁where ▁a ▁Paris ian ▁square , ▁a ▁number ▁of ▁streets ▁and ▁the ▁mus k ete ers ▁g arrison ▁were ▁constructed . ▁A ▁dis used ▁convent ▁had ▁additional ▁sets ▁constructed ▁including ▁ta ver ns , ▁bed rooms ▁and ▁mort u ary . ▁ ▁Cast ing ▁During ▁film ing ▁of ▁the ▁first ▁series ▁Peter ▁Cap ald i ▁learned ▁that ▁he ▁had ▁been ▁given ▁the ▁role ▁of ▁the ▁Tw elf th ▁Doctor ▁in ▁Doctor ▁Who . ▁The ▁show ' s ▁executive ▁producer