The idea to build a very very large TV and radio communication structure originated in 1968. After 5 years of planning, construction on the CN Tower began in 1973 and at a cost of $63,000,000 CDN, the 553.33 m (1,815.4 ft) tower was completed in 1976 and became the world's tallest free standing structure, a record it held for 34 years. Original photography from 2015 using a Canon EOS 60D body with a Sigma 17-70mm f2.8 DC Macro OS lens. Reprocessed using Silver EFEX Pro as a Lightroom plugin for the Black and White conversion. Brian Carson The Learning Curve Photography @ https://linktr.ee/thelearningcurvephotography