Columbia subject headings:
Christian art and symbolism--Germany--Congresses.
Mary, Blessed Virgin, Saint--Art--Congresses.
Harvard subject headings:
Christian art and symbolism--Congresses
Mary, Blessed Virgin, Saint--Art--Congresses.
Mary, Blessed Virgin, Saint--Devotion to--Congresses.
Princeton subject headings:
Christian art and symbolism--Congresses.
Mary, Blessed Virgin, Saint--Art--Congresses.
Mary, Blessed Virgin, Saint--Devotion to--Congresses.