Saint Sophia Cathedral in Ukraine is an exquisite showcase of Byzantine architecture, constructed back in the 11th century, right in the heart of Kyiv. It boasts magnificent domes and is adorned with detailed mosaics and frescoes on the inside. Being a part of the Kyiv-Pechersk Lavra complex, it holds the honor of being a UNESCO World Heritage site, and it stands as a vital emblem of Ukrainian culture and history.