An user Galician
says…

Histórica  porque
Subordinating conjunction
  estivo
Auxiliary
 pechada  ao
  público
Adjective
.

Historically, it was closed to the public.
Words and sentences
New
porque

  1. because
  2. why

New
estivo

third-person singular preterite indicative of estar

New
ao

Contraction of a o (“to the, towards the”).

New
público

  1. public (pertaining to the affairs of all people)
  2. public (open to general view)
  3. public (provided by the government)

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