Representatives of companies seeking new locations to set up headquarters, warehousing and distribution sites or research and development centers will be among the attendees of the Super Cities of the 21st Century Conference to be held in Madrid, May 2-5, according to William Rosenthal, president of Norcross-based Conway Data, which is organizing the conference.

Mr. Rosenthal also said in an interview in Conway Data’s offices in Technology Park that other prospective attendees at the conference include representatives of construction and design firms who wish to know of urban initiatives around the world.

And he added that urban leaders involved in planning and economic development would find the conference useful.  The mayors of Athens, Barcelona, Lisbon, Madrid, Moscow, Rome and Sao Paulo are among the city officials expected to attend the conference.

Atlanta’s mayor, Bill Campbell, has been invited to the conference, but Mr. Rosenthal did not know as of last week whether he would be able to attend.

Conway Data is an independent research, publishing and advisory organization serving the global corporate real estate community.  It was established in 1954 by McKinley Conway, a former Georgia state senator and an internationally known consultant on economic development.

The company also manages the World Development Federation, an international federation of individuals and organizations interested or involved in large-scale development projects.   The Super Cities conference is the seventh in the World Development Federation’s series of annual global super project conferences.

For more information, Mr. Rosenthal may be reach by calling (770) 446-6996; fax, (770) 263-8825.  His E-mail address is bill.rosenthal@

To learn more about the conference, go to