He also encouraged a popular audience to think about new uses for glass facades and energy - efficient design .
While his influence in the broader architectural field was muted , Hajjar was one of the architects who encouraged the development of Modern architecture in central Pennsylvania .
Hajjar also encouraged a popular audience to think about new uses for glass facades and energy - efficient design .
While his influence in the broader architectural field was muted , Hajjar was one of the architects who encouraged the development of Modern architecture in central Pennsylvania .