Shalom Ben-Tsion, and thanks for your note.
The pictures from Ellen Cassedy are both from the former 'shulhoyf' -
- the main complex of religious buildings that were at the core of
Jewish Keidan. I think the one with the statues was the 'groyse
shul', also known as the 'kalte shul' because it was not heated and
was thus used only in the warmer months. My grandfather's story
about Simchas Torah describes the building in great detail, so I
guess they used it until after the High Holidays. The other building
is the 'bes medresh' or study house -- which was also a synagogue,
but was that also called the 'shiva kru'im'? I had thought that was
the name of one of the smaller 'shtiblekh' used by such minyans as
the gravediggers, tailors or former soldiers from the Czar's army.
Also, how would you translate 'shiva kru'im' into English? Is it
Seven Guests? And do you know the origin of that name? Is it a
reference to something in the Bible, or Talmud?