While, on the 500th anniversary of Luther’s nailing his theses onto the door, the Catholics and Lutherans agreed that it is by faith alone that we are saved, and that our good works merely manifest our thankfulness is being saved, and that each church is essentially correct in his proclamation of the essence of the faith, it is instructive to consider that Luther (also) erred in matters of politics and economics. Luther said it was a mortal sin to disobey the princes of this world. Adolf Hitler showed that ruling to be an error.
https://en.wikisource.org/wiki/The_Ninety-Five_Theses
“Why does not the pope, whose wealth is to-day greater than the riches of the richest, build just this one church of St. Peter with his own money, rather than with the money of poor believers?”