Buildings are of so many types it is impossible to list them here, but they are categorized by purpose. Man has created nearly endless and amazing forms of architecture and building techniques. When there is a need, someone can build something to fit that need. The Alamo? The Eiffel Tower? The Sears Building in Chicago on down to the simplest hut in Dubai, are all buildings. Available materials, workforce and environment in which you are building all play a strong part in the choice of what and how to build, but most importantly is purpose. Church? Office? Daycare center? Hospital? All are buildings but none would be built the same.