.museum-closed-home
{
    display: none; /* <-- Set to "none" when the museum is open; set to "inline" when the museum is closed. */
}
.museum-closed
{
    display: block; /* <-- Set to "none" when the museum is open; set to "block" when the museum is closed. */
}

.library-closed-home
{
    display: none; /* <-- Set to "none" when the library is open; set to "inline" when the library is closed. */
}
.library-closed
{
    display: block; /* <-- Set to "none" when the library is open; set to "block" when the library is closed. */
}