Mozart stayed in the Chapter Deanery by invitation of count Leopold Antonín Podstatský because Mozart suffered from smallpox. Mozart stayed there from 28 oktober to 23 december 1767. After he recovered Mozart composed the Olmütz symphony.

Symfonie Nr. 6 in F majeur (KV 43)
www.youtube.com/watch?v=73jTK5hlYEA

The plaque dates from 1937, on the occasion of the 170th year after the stay.