From Brickipedia, the LEGO Wiki
- This article is about the year. For the set, see 1973 Emirates Airliner.
- June 11: LEGO Systems, Inc. was established in Brookfield, Connecticut.
- The modern LEGO logo began to appear on all products.
- The first LEGO products were sold in Hungary.
- LEGO Portugal was established.
Themes introduced or discontinued
- Universal Building Sets were introduced.