Piano concertos by Wolfgang Amadeus Mozart it was probably J.C. Bach, whom Mozart admired, who introduced the structural innovation of allowing the keyboard to introduce new thematic material in its first entry. Concertos Nos 1–4 (K. 37, 39, 40 and 41) are orchestral and keyboard arrangements of sonata movements by other composers. The next three concertos (K. 107/1, 2 and 3), which are not numbered, are arrangements of piano sonatas by J.C. Bach (Op 5. Nos. 2, 3, and 4, all composed by 1766). Based on handwriting analysis of the autographs they are believed to date from 1771–72. Concerto No. 5, K. 175 from 1773 was
Brandenburg stone Brandenburg stone The Brandenburg stone is an inscribed stone slab found in Brandenburg, Kentucky, United States in 1912, on the farm of Craig Crecelius. The stone contains a strip of linear markings that resemble letters of a script. Crecelius exhibited the stone several times, but was unable to find anyone who could identify the markings. Jon Whitfield, who acquired the stone in 1965, claims that they are Coelbren, a Welsh-language alphabet. Other writers have elaborated on these claims, arguing that this is evidence of pre-Columbian contact between the legendary Welsh prince Madoc and Native Americans. The consensus of Welsh scholars