Arched Gateways Pan-Asian Architecture
Since it's one of the more pan-Asian holidays today, here's one of my favorite bits of more pan-Asian architecture: the arched gateways called torana in ancient India             , & which became paifang in China             ,  hongsalmun in Korea             ,  torii in Japan             ,  sao ching cha in Thailand             , Kori agung in Bali             and etcs.  source