The Gram stain, developed in 1884 by Hans Christian Gram, characterises bacteria based on the structural characteristics of their cell walls. The thick layers of peptidoglycan in the "Gram-positive" cell wall stain purple, while the thin "Gram-negative" cell wall appears pink. By combining morphology and Gram-staining, most bacteria can be classified as belonging to one of four groups (Gram-positive cocci, Gram-positive bacilli, Gram-negative cocci and Gram-negative bacilli). Some organisms are best identified by stains other than the Gram stain, particularly mycobacteria or Nocardia, which show acid-fastness on Ziehl–Neelsen or similar stains. Other organisms may need to be identified by their growth in special media, or by other techniques, such as serology.
What color do Gram positive bacteria cell walls turn to after being stained?
purple

In the course of this religious upheaval, the German Peasants' War of 1524–25 swept through the Bavarian, Thuringian and Swabian principalities. After the Eighty Years' War in the Low Countries and the French Wars of Religion, the confessional division of the states of the Holy Roman Empire eventually erupted in the Thirty Years' War between 1618 and 1648. It devastated much of Germany, killing between 25% and 40% of its population. The main tenets of the Peace of Westphalia, which ended the Thirty Years' War, were:
Where was the German Peasants' War?
the Bavarian, Thuringian and Swabian principalities

The Jawa Dwipa Hindu kingdom in Java and Sumatra existed around 200 BCE. The history of the Malay-speaking world began with the advent of Indian influence, which dates back to at least the 3rd century BCE. Indian traders came to the archipelago both for its abundant forest and maritime products and to trade with merchants from China, who also discovered the Malay world at an early date. Both Hinduism and Buddhism were well established in the Malay Peninsula by the beginning of the 1st century CE, and from there spread across the archipelago.
Apart from the Indian traders, who else discovered the Malay peninsula for trade?
merchants from China