1

It’s built into a once-secular building

2

It’s remarkably well-fortified

3

It’s connected to a secular business

4

The clergy are largely related to each other

5

It’s in an unusually dangerous location

6

It shares space with a friendly faith

7

It follows unusual prohibitions or rites

8

It has access to some ancient artifact

9

The library is remarkably extensive

10

It attracts prophets and religious merchants

11

It provides some illicit or scandalous service

12

It’s more a merchant enterprise than a shrine

13

It’s unusually beautifully-built

14

It’s a shadow of a once-glorious past

15

It’s unusually recent in its founding

16

The clergy generally hate each other there

17

Its leadership is foreign or demihuman

18

It deals only with the proven faithful

19

It displaced a former faith, perhaps violently

20

It actually is another faith, merely concealed