You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
American_Broadcasting_Company

Context:
The ABC logo has evolved many times since the network's creation in 1943. The network's first logo, introduced in 1946, consisted of a television screen containing the letters "T" and "V", with a vertical ABC microphone in the center, referencing the network's roots in radio. When the ABC-UPT merger was finalized in 1953, the network introduced a new logo based on the seal of the Federal Communications Commission, with the letters "ABC" enclosed in a circular shield surmounted by the bald eagle. In 1957, just before the television network began its first color broadcasts, the ABC logo consisted of a tiny lowercase "abc" in the center of a large lowercase letter a, a design known as the "ABC Circle A".

Question:
When did ABC adopt it's iconic circle logo?

1957