This resource provides a good explanation of Kant's famous analytic-synthetic distinction. After explaining it, author critiques Kant's resolution of the problem of first principles.

This article is a reference to Severus's military rule and how he was able to maintain it.

The Friesian School gives a description of the Kings and Emperors of France and the Frank influence in northern Europe. There are also detailed maps.

A very lengthy page from friesian.com discussing Bohr's theory of electronic energy levels and the explanation of commonly observed atomic emission line spectra. The concept of a photon and Einstein's observation of the photoelectric...

This resource argues a stricter interpretation of Kant's "intuition" than is commonly held.