From 1540, Cosimo I tried to convin

From 1540, Cosimo I tried to convince Charles V to hand over control of the
island of Elba and the state of Piombino, where he had sustained substantial
expenses for fortifications. In 1548, Cosimo obtained both of these, although
the possession of Piombino lasted little more than a month. The Duke of Florence,
however, did not give up and continued trying to retrieve Piombino, whilst
also intensifying work at Portoferraio, which had remained in his possession.
His efforts resulted in an ephemeral success when in August 1552 he signed a
treaty with his cousin Iacopo VI Aragona Appiano for the state of Piombino to
be redelivered to him.6

Hasil (Bahasa Indonesia) 1:

Dari 1540, Cosimo aku berusaha meyakinkan Charles V untuk menyerahkan penguasaan
pulau Elba dan keadaan Piombino, dimana ia telah mengalami substansial
biaya untuk benteng. Pada tahun 1548, Cosimo diperoleh keduanya, meskipun
kepemilikan Piombino berlangsung sedikit lebih dari satu bulan. Duke of Florence,
namun, tidak menyerah dan terus mencoba untuk mengambil Piombino, sementara
juga mengintensifkan bekerja di Portoferraio, yang tetap dalam nya kepemilikan
usahanya membuahkan keberhasilan yang fana ketika pada 1552 Agustus ia menandatangani
perjanjian dengan nya sepupu Iacopo VI Aragona Appiano untuk negara Piombino untuk
redelivered untuk him.6