Modernist poet Perets Markish was among those executed in 1952. One of his most famous poems is Brokhshtiker (Shards.) From Brokhshtiker comes the image of a shpigl af a shteyn, a mirror on a stone. Shpigl af a shteyn is also familiar to students of Yiddish literature as the title of the most important anthology of Soviet Yiddish writing.
Here's the title page of my very old copy:
And the list of authors found within:
For this year's August 12th commemoration, Australian animator Jack Feldstein created a short film set to Brokhshtiker. Feldstein uses a technique he calls 'neonizing' which is "a combination of live action video recording and public domain material..." The result, with Yiddishist Shane Baker reciting the words of the poem, is a beautiful new interpretation of Markish and his poetry.