Jena is a town in central Germany on the River Saale. With a population of 102.494, it is the third biggest town in the federal state of Thuringia.

• The 13th century Rathaus ("Town Hall"). It has astronomic clock featuring the Schnapphans ("Snatching Hans").
  
• The Gothic St. Michael's Church (Michaelskirche, 1506). It has a bronze slab of Martin Luther's tomb
  
• Monument to John Frederick the Magnanimous (1905-08), in the Market Square
  
• The Old Castle and numerous towers from the medieval fortifications, including the Powder Tower (13th-14th centuries)
  House and Church of Friedrich Schiller.
  
• The Botanical Garden, founded in 1580, the second oldest botanical garden in Germany
  
• Jen-Tower, a research edifice built in GDR times. There is a restaurant and viewing platform at the 27th floor.
  

In the neighbourhood are the Dornburg Castles and the Kapellendorf Moated Castle.