Membranes contain large amounts of lipids, which are notoriously hydrophobic (water and oil don't mix). The membrane-spanning regions of membrane proteins are typically alpha helices, made of hydrophobic amino acids.
Florence, for example, hosted a brilliant period of musico-theatrical innovation at the dawn of the seventeenth century that led to the flowering of early opera. Rome continued to influence sacred music and for a time became an important center of opera, several types of vocal chamber music, and instrumental music. Venice, a leading musical city throughout the seventeenth century, nurtured the development of opera, as did Naples in the eighteenth century.
The traditional categories are Medieval Music (1150 to 1400), Renaissance Music (1400 to 1600), Baroque Music (1600 to 1750), Classical Music (1750 to 1830), Romantic Music (1830 to 1920) and Contemporary Music (1920 to the present).