Why there is no number 13 on floors in buildings?

There is a common superstition that the number 13 is unlucky, and some people avoid it as a result. In some buildings, this has led to the omission of the number 13 from floor numbering, with the floor above the 12th being labeled as the 14th instead.

This practice is most common in the United States and Canada, but it can also be found in other parts of the world. There is no single explanation for why this superstition exists, but some theories suggest that it may date back to ancient Norse mythology, where Loki was the 13th guest at a dinner party and brought chaos and destruction.

Others suggest that it may be linked to the fact that there were 13 people present at the Last Supper, and one of them (Judas Iscariot) betrayed Jesus. Whatever the reason, the fear of the number 13 is a real phenomenon, and it has had a significant impact on architecture and design.

In addition to the omission of the number 13 from floor numbering, some buildings also avoid using it for room numbers, street addresses, and other designations. This practice is not as common as the omission of the number 13 from floor numbering, but it does occur in some cases.