。
The topics were many and varied.
Literal
Topic [topic-は] many-kinds-varied was.
A concise sentence with a long noun. 多様多種 ('many-kind many-variety') — wait, this is actually 多種多様 (たしゅたよう) meaning 'diverse, varied, many types' — a four-character compound. The order 多様多種 is non-standard; the standard form is 多種多様. The sentence describes past conversation topics as wide-ranging.