The Hoofdtoren is one of the last remaining fortifications in Hoorn, Holland. #hoorn #hoofdtoren #16thcentury #holland #draw #drawing #drawings #drawdaily #dailydrawing #drawingoftheday #sketch #sketching #dailysketch #sketchdaily #sketchofday #sketchoftheday #inkmatters #penandink #ilovedrawing #pensketch #penandink #copicmultiliner