"Endless Poem"

The following is a poem by Amichai.  What rhetorical devices does he use and for what effect?  Read and respond.

Endless Poem

In a modern museum
In an old synagogue
In the synagogue
I
Within me
My heart
Within my heart
A museum
Within a museum
A synagogue
Within it
I
Within me
My heart
Within my heart
A museum 

Yehuda Amichai