Designed by Simpson and Wilson, and built between 1890 and 1896 by Glasgow Tunnel Company, http://www.bbc.co.uk/scotland/whereilive/coast/stages.shtml?stage=4&walk=strathclyde the Rotunda covered 24 meters deep shafts http://www.clydewaterfrontheritage.com/harbourtunnelandrotundas.aspx to tunnels which enabled vehicular and pedestrian access to the other side of the river.