sentences:  The closest métro station is Châtelet 
  
  The name "Châtelet" refers to the stronghold, the Grand Châtelet, that guarded the northern end of the Pont au Change, containing the offices of the "prévôt de Paris" and a number of prisons, until it was demolished from 1802-10.At the square's center is the Fontaine du Palmier, designed in 1806 by architect and engineer François-Jean Bralle (1750-1832) to celebrate French victories in battle.It has a circular basin, in diameter, from which a column rises in the form of a palm tree's trunk tall.