Meaning of お宮 in Japanese

以前このあたりに小さなお宮があった。
There used to be a small shrine around here.

お宮参りで訪れた大西幸治さん(40)、由希恵さん(34)夫妻は「子どもが健やかに育つことを祈りました」と話していた。
The couple who came on a shrine visit, Kouji Oonishi (40) and his wife Yukie (34) said, "We prayed that our child would grow up healthily."