Cool SL item #1, read about it here at Wikipedia.
About the numbering: At first I will be posting up items or potential items for a temporary or draft list of possible final items. Once that's completed/once we have over 1000 items, will review the temporary list, make any necessary changes, & will create the final list.
From the Wikipedia article:
"The temple was built by King Devanampiya Tissa who ruled in the ancient Sri Lankan capital of Anuradhapura."
Go here for more.