The 2009 calendar yea Trading Master Plan – Send Your Commissions Into Overdrive. r was another strong year for the City of Pella in the tourism department. Jill Vandevoort, Executive Director of the Pella Convention and Visitors Bureau says that a steady stream of guests – many arriving by motor coach – helped to bolster retail sales throughout the community. One of the marquee attractions for guests, the Vermeer Windmill and Pella Historical Village, also reported a strong year for tourism in 2009. Director Bonnie Verberg says after previous years with a slight decline, the popular attraction saw a five percent increase in guests last calendar year.