St. Louis Exposition and Music Hall

Legg's most prominent extant building is Academic Hall at Southeast Missouri State University.

[1] Originally built to house the St. Louis Exposition, an annual fair, it covered 6 acres (2.4 ha) at Olive and 13th Streets and was one of the first buildings in the country to have electric lights.

The Music Hall, which was a home for the St. Louis Symphony, had a stage which could accommodate 1,500 people and claimed to be one of the world's largest.

[2] In the winter of 1896 the Republican National Convention planned to be in a rebuilt permanent building in the center.

The temporary structure was erected within sixty days at cost of $60,000 including decorations.