Translation of "simposium" into English

Berapa panjangkah seharusnya kata pengantar khotbah jika itu merupakan bagian dari suatu simposium?

How long should the introduction of a talk be when it is part of a symposium?

Simposium pertama kebaktian itu berjudul ”Mengajar Diri Sendiri seraya Mengajar Orang Lain”.

The first symposium of the convention was entitled “Teaching Ourselves While Teaching Others.”