what else appeared during this era

The era could refer to different time periods, so here are some major events and cultural elements that appeared in different eras:

1. Classical Antiquity (c. 8th century BCE – 5th century CE):
- Development of Greco-Roman philosophy, art, and literature.
- The rise and fall of the Roman Empire.
- Invention of democracy in Athens, Greece.
- Construction of iconic structures like the Parthenon and Colosseum.

2. Medieval Period (5th century – 15th century):
- Feudalism and the prominence of knights and castles.
- The Crusades, marking a series of holy wars between Christians and Muslims.
- Gothic architecture and the construction of cathedrals.
- The Black Death, a devastating pandemic in Europe.

3. Renaissance (14th century – 17th century):
- Rediscovery of classical Greek and Roman works.
- Advances in science, art, and literature, including the works of Leonardo da Vinci and Michelangelo.
- The Protestant Reformation led by Martin Luther.
- Exploration and colonization, such as Christopher Columbus' voyages.

4. Industrial Revolution (18th century):
- Mass production in factories.
- Technological advancements, such as the steam engine and spinning machines.
- Urbanization and the growth of cities.
- Social and economic changes, including the rise of capitalism and the working class.

5. Modern Era (19th century – present):
- The World Wars and other major conflicts.
- The rise of nationalism and decolonization movements.
- Scientific and technological advancements, like the invention of electricity and the internet.
- Cultural movements such as Impressionism, Cubism, and Minimalism in art.

These are just a few examples, and there are numerous other significant events and cultural phenomena that appeared during different eras.