In English the word 'Sanctuary' can refer to ether a place of safety or a religious building, as in Europe the two have traditionally been one of the same, as during the crusades for example, many saintly bishops housed Jew's on their grounds to protect them from being prosecuted by their own christian brothers.
This being said, let's say in a super religious city, atheists are abused for their faithlessness. As a result of this someone opens a building that's meant to act as a sanctuary for this minority, and cleverly names the building in Japanese as to allow it to hide in the open.
This super unneeded setup aside, you could start this name as 「無神論者の？」、but what word would you use for the ?, as a sanctuary in this context is that it's a safe-place, but is definitively non-religious, and thus needs a neutral term.
So ya, rambling aside, what word would you use to describe a properly non-religious safe-place? As all I've managed to find are religious terms.