A building, structure or site may be considered important for a variety of reasons. It may have architectural value or it may relate to a significant person, an important event in the history of the city or a critical time in the development of one of its neighbourhoods. A building may be well crafted or represent a characteristic of the community. A building does not have to be "old" to be an important heritage property. Many modern buildings and structures such as Roy Thomson Hall and the CN Tower are significant parts of our heritage and are symbols of our city. Nor does a property have to be a grand public building - small cottages, warehouses, industrial structures and bridges are also valuable legacies of the past and deserve to be protected and preserved.