If you want to watch the original Indiana Jones trilogy which movie should first one was considered a prequel?

You're right! The first Indiana Jones movie, Raiders of the Lost Ark (1981), is actually the second movie chronologically in the original trilogy.

Here's the order in which they take place:

1. Temple of Doom (1984) - This movie is a prequel to Raiders and takes place in 1935.

2. Raiders of the Lost Ark (1981) - This movie takes place in 1936, directly following Temple of Doom.

3. The Last Crusade (1989) - This movie takes place in 1938.

So, if you want to watch the original trilogy in chronological order, you should start with Temple of Doom.