Anthony Thieme (20 February 1888 – 6 December 1954) was a landscape and marine painter and a major figure of the Rockport (MA) School of American regional art. He was a contemporary of important Rockport artists Aldro Hibbard, Emil Gruppe, W. Lester Stevens, Antonio Cirino, and Marguerite Pierson. Reference: Wikipedia
Below are some examples and price guides of paintings by Anthony Thieme including an oil on canvas of the Bahamas and an oil painting of Route D’auribeau

Cat Boats at Dock
signed “A Thieme’ (in the paint layer lower left)
oil on canvas
25 x 30 in.
period frame 30 1/2 x 35 3/4 x 2 3/4 in.
Sold for US$8,960 inc. premium at Bonham’s in 2023

Anthony Thieme
American, 1888-1954
In the Bahamas
Signed A Thieme © (lr); inscribed 980 and as titled on the reverse
Oil on canvas
40 x 50 1/4 inches
Sold for $31,500 (includes buyer’s premium) at Doyle in 2023

Anthony Thieme (MA, 1888 – 1954) oil on board, (likely) Gloucester MA harbor scene, signed lower left A. Thieme, with signed study on reverse. Image 8” x 10”, Overall 12” x 13.5”.
Sold for US$3,000 at Eldred’s in 2023

Anthony Thieme (American, 1888–1954) Route D’auribeau.
Oil on canvas
25 x 30 in. (63.5×76.2cm)
Sold for US$3,000 at Freeman’s in 2023