i astic ▁se als ▁but ▁no ▁text . ▁It ▁is ▁unknown ▁whether ▁this ▁has ▁always ▁been ▁the ▁case , ▁but ▁the ▁presence ▁of ▁two ▁f ools , ▁one ▁of ▁them ▁holding ▁a ▁pair ▁of ▁reading ▁glass es , ▁indicates ▁that ▁this ▁is ▁the ▁intention ; ▁the ▁Catholic ▁Church ▁is ▁presented ▁as ▁without ▁content . ▁Below , ▁a ▁mon k , ▁standing ▁a ▁front ▁of ▁a ▁group ▁of ▁men ▁holding ▁letters ▁of ▁indul gence ▁is ▁confront ed ▁by ▁another ▁group ▁of ▁people ▁holding ▁similar ▁letters . ▁This ▁protest ▁scene ▁against ▁the ▁sale ▁of ▁indul gen ces ▁is ▁inspired ▁by ▁a ▁contemporary ▁wood car ving ▁by ▁N ure m berg ▁artist , ▁Hans ▁Seb ald ▁Be ham , ▁who ▁was ▁sta unch ly ▁anti - C atholic . ▁ ▁Problem s ▁of ▁rest oration ▁While ▁rest oration ▁techniques ▁are ▁constantly ▁impro ving , ▁the ▁fres cos ▁are ▁increasing ly ▁end anger ed ▁by ▁the ▁he ating ▁systems ▁installed ▁in ▁churches ▁and ▁by ▁other ▁activities ▁such ▁as ▁concert s ▁which ▁now ▁take ▁place ▁in ▁the ▁churches . ▁Unless ▁alternative ▁solutions ▁are ▁found , ▁the ▁only ▁secure ▁way ▁to ▁preserve ▁the ▁paint ings ▁would ▁be ▁to ▁cover ▁them ▁with ▁l ime w ash ▁once ▁again . ▁ ▁See ▁also ▁ ▁El mel unde ▁Master ▁F an ef j ord ▁Church ▁List ▁of ▁church ▁fres cos ▁in ▁Sweden ▁ ▁Notes ▁ ▁External ▁links ▁National ▁Museum ▁of ▁Den mark ' s ▁search able ▁database ▁of ▁k alk mal eri ▁images . ▁ ▁Bibli ography ▁ ▁C . ▁R .