Dororo to Hyakkimaru

World Masterpiece Theatre is a Japanese TV anime staple that showcases an animated version of a different classical book or story each year. It originally aired from 1969 to 1997 and then resumed in 2007. WMT series were originally produced by Mushi Production and Zuiyo Eizo, and then by the latter's successor Nippon Animation, and originally air primarily on Fuji Television.

The series has been known by various different names over the years, often reflecting changes to the sponsors, but "World Masterpiece Theatre" is the name most commonly used by viewers. Nippon Animation's official English name for the series is The Classic Family Theater Series.

(Source: Wikipedia)

impactful anime that exist in black and white

Classic 20th-century series and films that most old-school otaku have heard of and many older fans will cite as the reason they became a life-long weeb in the first place. Some have gotten sequels or modern reboots, while others have been relegated to the past and stand alone as fondly-remembered products of their time. If you want to take a journey through anime history, these shows are the place to start!

Additional info as requested by MAL staff:

Definition of classic: "A work of art of recognized and established value."

Criteria for this list: Were popular or well-known at some point during the 20th century, or were based on well-known source material of the time.

A comprehensive watch order of the Dororo series, which includes every entry of the Dororo franchise.
Original Guide: https://myanimelist.net/forum/?topicid=1866650

AEGC Interest Stack index: https://myanimelist.net/forum/?topicid=2017008

Anime series and movies featuring characters inspired by supernatural creatures from Japanese folklore.

one per year, and once per licence (to the best of my abilities)

Series referring to mythologies and religions.

As simple as the title suggest, a stack of anime that have a remake

For each series will add objective differences and my personal opinion
Haven't watched all of them but will add my thoughts as i watch

If you know of any other remakes hit me up with a comment :)