The word 'seminary' often relates to institutions for those devoted to pursuing religious careers. He's at the seminary studying to become a deacon.
Pro Tip 2/3
Gender history
Historically, seminaries enrolled only men, but many now are coeducational. The seminary now welcomes female students training for the priesthood.
Pro Tip 3/3
Cultural significance
In many cultures, seminaries are respected places and people attending them are held in high esteem. Her family was proud when she entered the seminary to dedicate her life to spiritual service.