Two word answer needed. My friends who are ballroom dancers were very excited when dancesport was elevated by the IOC in 1997. I wasn't too excited. Within dancesport, choreography can vary from team to team, except in this particular dance. In this dance, the international syllabus restricts couples to moves that include contra checks, left whisks, and fleckerls. Identify this oldest form of ballroom dance, which references a Central European city where it originated in the late 18th century. Remember: two word answer needed.