[2] Established in the town of Opoczno originally in the mid 19th century, it became the first and largest ceramic tiles manufacturer already in Congress Poland under the Russian partition.

[5] The Revolutions of 1989 and the fall of totalitarianism in Eastern Europe brought dramatic changes – with introduction of the free market economy – prompting further structural changes.

[9] The original Dziewulski & Lange factory of Opoczno received recognition[10] in relation to history of the Holocaust in occupied Poland.

An archaeological team performing excavations, led by Caroline Sturdy Colls of Staffordshire, explained that the evidence is of paramount importance, because the gas chambers at Treblinka were the only brick structure in the camp.

[13] Further analysis by Polish scientists led to the discovery of the true origins of the star identified as the historic trademark of the company which made the Treblinka tiles.

Archeological assessments published by Staffordshire in the period following the Smithsonian documentary no longer identified the logo as Jewish in origin, an issue of central importance previously.