Capitalization in English

Old English did not always make a distinction between uppercase and lowercase, and at best had embossed or decorated letters indicating sections.

With the development of the printing press in Europe and England capitalization of initial letters and proper nouns became more regularized,[1] perhaps partly to distinguish new sentences in a time where punctuation remained sparse and irregularly used.

The first lines of the U.S. Constitution of 1787 show major capitalization of most nouns: We the People of the United States, in Order to form a more perfect Union, establish Justice, ensure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America.

Yet the style lasted as late as the Civil War era in the United States, as some of Emily Dickinson's poems still capitalize many common nouns.

[21] English usage is not consistent, but generally prepositions and articles are not capitalized: "the Forest of Dean", "Gone with the Wind", "University of Southampton".

The capital letter "A" in the Latin alphabet followed by its lower case equivalent.
Capitalization in Chaucer's Canterbury Tales (Ellesmere Manuscript, about 1400)
Capitalization in Shakespeare's Julius Caesar (Bodleian First Folio)