 The first broadcasts came from DuMont 's 515 Madison Avenue headquarters , and it soon found additional space , including a fully functioning theater , in the New York branch of Wanamaker 's department store at Ninth Street and Broadway . Later , a lease on the Adelphi Theatre on 54th Street and the Ambassador Theatre on West 49th Street gave the network a site for variety shows , and in 1954 , the lavish DuMont Tele @-@ Centre opened in the former Jacob Ruppert 's Central Opera House at 205 East 67th Street . 
 The first broadcasts came from DuMont <a href='null_genetive' title='1'><mark>'s</mark></a>515 Madison Avenue headquarters , and it soon found additional space , including a fully functioning theater , in the New York branch of Wanamaker <a href='null_genetive' title='2'><mark>'s</mark></a>department store at Ninth Street and Broadway . Later , a lease on the Adelphi Theatre on 54th Street and the Ambassador Theatre on West 49th Street gave the network a site for variety shows , and in 1954 , the lavish DuMont Tele @-@ Centre opened in the former Jacob Ruppert <a href='null_genetive' title='3'><mark>'s</mark></a>Central Opera House at 205 East 67th Street . 
Da first broadcasts came from DuMont  515 Madison Avenue headquarters , and it soon found additional space , including a fully functioning theater , in the New York branch of Wanamaker  department store at Ninth Street and Broadway . Later , a lease on tdaAdelphi Theatre on 54th Street and the Ambassador Theatre on West 49th Street gave the network a site fir variety shows , and in 1954 , the lavish DuMont Tele @-@ Centre opened in the former Jacob Ruppert  Central Opera krib at 205 East 67th Street .