Eugene Tssui (/tsweɪ/ Chinese: 崔悅君; pinyin: Cuī Yuèjūn born Eugene Tsui, September 14, 1954) is an American architect noted for his use of ecological principles and "biologic" design, a term coined by Tssui himself in the 2010 issue of . He has proposed a number of projects such as a bridge across the Strait of Gibraltar to connect the continents of Africa and Europe as well as a 2-mile-high tower capable of housing 1 million residents.He has been called the "Seminal Architect of the 21st Century." In May of 2013, Tssui was also listed as one of one hundred "Guardian Angels of the Planet" by .