Q: Is a roundel a circular disc used as a symbol? ¶
A: Yes.
Q: Are roundels among the oldest charges used in coats of arms? ¶
A: Yes, and dating from at least the twelfth century.
Q: Is a roundel the flag of Bangladesh and the flag of Japan? ¶
A: Yes.
Q: Is a roundel a circular charge? ¶
A: Yes.