The heart of the city is the market. In its middle, Leipzig's city coat-of-arms is set in mosaic paving. The market has been the scene of last executions and first political demonstrations. In 1824, Woyzeck, later to be resurrected in a play by Büchner, died here under the executioner's axe. In 1830, the citizens of Leipzig came to this square to force overdue reform. As a result, their right of co-determination was put in writing in a new city code. Today the market square is a popular meeting place, above all on occasions like the City Festival, Classic Open, Market Days, Christmas Market and lots of other events. Underneath the market square is the underground trade-fair hall, built in 1925 and restored in 1990.