I visited Leipzig (Germany) on 30 September (2015)—1 October (2015) at the occasion of this year's BuildMoNa colloquium (on unconventional superconductivity).
I had little time to visit the city itself but as the center is very small, I could quickly wander between the two main churches, passing by Faust's Mädlerpassage  and feel the eerie sensation of finding myself, at last, in the church where Bach performed the Matthäuspassion.
Nikolaikirche, the main church.
The Neues Rathaus is new (1905), but still pretty.
Bach's grave in Thomaskirche.
A picturesque German rooftop on the Market square.