This document provides information about the tallest buildings in the world and Canada. It lists the top 10 tallest buildings globally and in Canada based on architectural height. The Burj Khalifa in Dubai is the current tallest at 828 meters. The first Canadian Place in Toronto is the tallest in Canada at 298 meters. The timeline shows how building heights have increased over 120 years, from under 100 meters in the late 1800s to over 800 meters currently.