Editing Saint Basil's Cathedral (section)

==== 1583–1596 ====
The original Trinity Church burnt down in 1583 and was refitted by 1593.<ref name=K401/> The ninth sanctuary, dedicated to [[Basil Fool for Christ]] (the 1460s–1552), was added in 1588 next to the north-eastern sanctuary of the Three Patriarchs.<ref name=K401/> Another local fool, Ivan the Blessed, was buried on the church grounds in 1589; a sanctuary in his memory was established in 1672 inside the south-eastern arcade.<ref name=K402/>

The vault of the Saint Basil Sanctuary serves as a reference point in evaluating the quality of Muscovite stonemasonry and engineering. As one of the first vaults of its type, it represents the average of engineering craft that peaked a decade later in the church of the Trinity in Khoroshovo (completed 1596).<ref name=BD29/> The craft was lost in the [[Time of Troubles]]; buildings from the first half of the 17th century lack the refinement of the late 16th century, compensating for poor construction skill with thicker walls and heavier vaults.<ref name=BD29>Buseva-Davudova, p. 29</ref>