。
She's an internationally renowned painter.
Literal
She [topic-は] internationally renowned painter is.
国際的に ('internationally') is the adverbial form of the na-adjective 国際的 ('international'), with に attaching the adverbial. 著名な ('renowned, well-known') is a slightly literary alternative to 有名な, with a sense of distinction in a serious or professional field. 画家 ('painter') uses the productive suffix ~家 ('expert, practitioner'), which appears in 政治家 ('politician'), 作家 ('writer'), 音楽家 ('musician'), 芸術家 ('artist'). The suffix turns a domain into a profession.