Cristina Pagnoncelli :: Decorative illustration done in chalk Italian restaurant La Pasta Gialla. ( ParkShopping Barigüi - Curitiba, Brazil ) [ https://www.typographyserved.com/gallery/La-Pasta-Gialla/20322053 ]
Spiral by Rachel Yallop. This is on the h.art website (link through picture) as 'calligraphy'. I first saw it on a Pinterest board by Emilie Weathers called 'Math in Art, Science & Nature', described as being inspired by the Fibonacci curve - simply beautiful!