。
I had my wedding ceremony last month.
Literal
I [topic-は] last-month wedding [object-を] raised [polite-past-げました].
式を挙げる ('to hold a ceremony,' literally 'to raise a ceremony') is the set idiom for formally performing a wedding, funeral, or other ceremony. 式 ('ceremony') alone is general; prefixed with 結婚 ('marriage') it specifies a wedding. Used for the ceremony itself, not the wedding reception (披露宴).