From left, Yevheniia Niukhtikova, Frank Moeller, Martin Fromm and Johannes Bruns — visitors from Muhlhausen, Germany, the sister city of Saxonburg and birthplace of borough founder John Roebling — receive a tour of the Maridon Museum in Butler Tuesday from museum docent Carole Fruehstorfer. The Butler County Tourism and Convention Bureau will have its annual Toast to Tourism Thursday night in Saxonburg, and Bruns, the Muhlhausen lord mayor, will speak.