[2] McElfatrick remained in New York City after his father died in 1906, and continued to specialize in theaters, but moved the office to Brooklyn.

[1] The McElfatrick firm designed many theaters and introduced innovations that included better floor layouts and sight lines, multiple exits, and fire sprinkler systems.

Arches above the boxes on each side of the stage held plaster figures of the muses by Ernest C. Bairstow (1876-1962).

The interior included a grand eight-foot wide staircase, neoclassical painted murals on canvas, a domed ceiling with allegorical Greek goddesses, pillars of faux marble and crystal chandeliers.

[5] The Empire Theatre in Baltimore opened in 1910 as a vaudeville house, designed by McElfatrick and the local architect Otto Simonson.

It went through many changes in the years that followed, as a Yiddish theater, boxing arena, bingo house, burlesque theatre, parking garage and cinema.