A "viking chair" i made last Winter. In my opinion, this is one of the most simple yet practical things you can make from wood. I also upgraded it with some woodburning :
Create A Beautiful And Comfortable Viking Chair Using Only Two Wooden Planks! - BRILLIANT DIY
1970s 'Viking' chair by Jim Myrstad for Brunstad Møbelfabrikk | #126494
Michael Coffey Viking Chair, 1960s For Sale at 1stDibs