A tall ship is a large, traditionally-rigged sailing vessel. Popular modern tall ship rigs include topsail schooners, brigantines, brigs and barques. "Tall ship" can also be defined more specifically by an organization, such as for a race or festival.
Group of "tall ships" at Hanse Sail 2010
The tall ship Kruzenshtern
More than 36 tall ships participated in the 200th anniversary of the Battle of Trafalgar in Portsmouth, part of the fleet of 167 naval, merchant and tall ships from 36 countries
The masts and yards of a brig
A topsail ("tops'l") is a sail set above another sail; on square-rigged vessels further sails may be set above topsails.
USS Constitution sailing under (bow to stern) jibs, topsails, and spanker.
La Recouvrance with both a gaff topsail and two square topsails; the partly obscured sail between the topmasts is a topmast staysail
Image: Sails 19th century ship