Mjøstårnet in Brumunddal, Norway. Currently the tallest completed timber building at 85.4 meters.

Image by Øyvind Holmstad, licensed under CC BY-SA 4.0.

If you're curious as to why wood is used, most likely the biggest answer is sustainability. Wood is a renewable resource is managed properly, and is carbon neutral as trees acquire carbon from the atmosphere. Compared to concrete, which is mined and releases carbon when it's made.