Complex sentence: During the 1970s, Stirling's architectural language began to change as the scale of his projects moved from small and not very profitable to very large, as Stirling's architecture became more overtly neoclassical, though it remained deeply imbued with his powerful revised modernism.
Split into simpler sentences: During the 1970s Stirling's architectural language began to change as the scale of his projects moved from small (and not very profitable) to very large. His architecture became more overtly neoclassical, though it remained deeply imbued with his powerful revised modernism.