Stories of how the pineapple came to symbolize hospitality abound.  Written records show the tropical fruit was imported from the Caribbean by American colonists beginning in the 17th century. The trade routes between the American continent and the Caribbean islands were notoriously perilous, and the journey was long and slow.  So when a pineapple actually made it to shore, it was considered a significant achievement, and it was a high honor for a guest to be offered this once rare fruit.  There are similar accounts of New England sea captains placing a pineapple outside of their homes upon safe return from trade routes in the Pacific and the Caribbean. 
 
What a historic and delightful way to welcome guests to your home!  This doorknocker is perfectly sized for most doors.  
 
(source: University of Central Florida Rosen Library)