GRAMMAR'S RESPONSE. The word premises is always plural, whether you're referring to the whole of the land and the buildings upon it or just part of the mall (or whatever). So you want are, always. Authority: Merriam-Webster's Collegiate Dictionary, Electronic Edition, Version 1.5.
Yonne is a department in the centre of France, in the Burgundy region. The largest city in the department, and its prefecture (capital), is Auxerre.
Besancon is a city found in Franche-Comte, France. It is located 47.25 latitude and 6.02 longitude and it is situated at elevation 300 meters above sea level. Besancon has a population of 128,426 making it the biggest city in Franche-Comte. It operates on the CEST time zone.