Deep-dive companion pieces written to accompany another entity elsewhere in this atlas, most often a landmark case, a jurist, a statute or a legal doctrine, expanding on one specific fact, ruling or turn in that entity's own story rather than covering a subject of its own. The grouping comes from the legal domain each piece's parent subject falls under: religious law and church-state relations, constitutional courts and comparative constitutionalism, legal philosophy and rule of law doctrine, English constitutional jurists and common law foundations, financial regulation and corporate law, and indigenous, human rights and comparative statutory law. This excludes any piece that stands as a subject in its own right with no single parent entity behind it; that kind of writing belongs on the case, jurist, statute, doctrine, code or regulation page it describes directly, not here as a companion article.