– 2 0 0 9 : ▁Ber nd ▁D oll ▁( CD U ) ▁ 2 0 0 9 – present : ▁Corn elia ▁Pet z old - Sch ick ▁ ▁Co at ▁of ▁arms ▁Bru chs al ' s ▁Co at ▁of ▁Ar ms ▁features ▁a ▁solid , ▁pol ished ▁silver ▁cross ▁on ▁blue ▁background , ▁with ▁a ▁silver ▁ball ▁in ▁the ▁top ▁left ▁quadr ant . ▁The ▁official ▁city ▁colors ▁are ▁white ▁and ▁blue . ▁The ▁Co at ▁of ▁Ar ms ▁symbol ized ▁the ▁Cross ▁of ▁Spe yer , ▁referring ▁to ▁the ▁fact ▁that ▁Bru chs al ▁was ▁the ▁official ▁residence ▁of ▁the ▁Bishop ▁until ▁ 1 8 0 3 , ▁and ▁has ▁been ▁in ▁use ▁for ▁many ▁centuries . ▁There ▁is ▁some ▁uncertainty ▁as ▁to ▁how ▁the ▁ball ▁came ▁into ▁the ▁arms . ▁The ▁ball ▁may ▁have ▁become ▁part ▁of ▁the ▁Co at ▁of ▁Ar ms ▁by ▁accident , ▁in ▁that ▁an ▁eng ra ving ▁fault ▁may ▁have ▁been ▁mis inter pre ted ▁in ▁an ▁older ▁print . ▁Res idents ▁refer ▁to ▁it ▁commonly ▁as ▁the ▁Sch and f le ck ▁( the ▁" bl ot ▁on ▁the ▁city ' s ▁esc ut che on "). ▁ ▁Main ▁s ights ▁ ▁Build ings ▁ ▁The ▁Ch âteau ▁of ▁Bru chs al ▁was ▁built ▁in ▁the ▁bar o que ▁style ▁of ▁the ▁mid ▁ 1 8 th ▁century , ▁starting ▁around ▁ 1 7 2 0 , ▁and ▁served ▁as ▁the ▁official ▁residence ▁of ▁the ▁b ish ops ▁of ▁Spe yer