Viking/bog chairs or star gazing chairs are called in different parts of the world. Simplest and oldest type chair design. It is perhaps the most simple design chair in the world and has come to be referred to as a camping chair, a bog chair, an X-chair, a stargazer chair, and a Viking chair. It is many things to many people in terms of design and use. But nobody can dispute the simplicity and practicality of these timeless pieces of furniture.