堂宇 is read as どうう (douu) and means edifice.
どうう
douu
いちう
one house
だいう
Daewoo (car company)
ほうう
temple (Buddhist)
こうう
aerospace
どうどう
grandly
どう
company
どうどうめぐり
circling a temple
はっこういちう
universal brotherhood
ろう
Russia and Ukraine
こうどう
auditorium
でんどう
hall of fame
うじきんとき
dessert of shaved ice, green tea syrup and red bean paste