\version "2.13.19"
tempoMark = {
  \once \override Score.RehearsalMark #'self-alignment-X = #LEFT
  \once \override Score.RehearsalMark #'break-align-symbols = #'(time-signature key-signature)
  \once \override Staff.TimeSignature #'break-align-anchor-alignment = #LEFT
  \mark \markup \bold {
    "Moderato " 
    \small \general-align #Y #DOWN \note #"4" #1 = 76
     }
}

global = {
  \tempoMark
  \key f \major
  \time 4/4
  \partial 4
}

rightOne = \relative c' {
  \global
  % Qui segue la musica.
  c8 c|
  a'4 a8  g a f e d|
}  
\addlyrics { Al tuo altare }

rightTwo = \relative c' {
  \global
  % Qui segue la musica.
  r4^\markup  "Popolo"|
  c2 a4 bes|
}

leftOne = \relative c {
  \global
  % Qui segue la musica.
  r4|
  
}

leftTwo = \relative c' {
  \global
  % Qui segue la musica.
  
}

\bookpart {
  \header {
  title = "AL TUO ALTARE"
  subtitle = "(Canto d‘ingresso)"
  composer = "F. Spingola"
}
  \score {
    \new PianoStaff \with {
      instrumentName = "Organo"
    } <<
      \new Staff = "right" \with {
        midiInstrument = "acoustic grand"
        } << \rightOne \\ \rightTwo >>
      \new Staff = "left" \with {
        midiInstrument = "acoustic grand"
      } { \clef bass << \leftOne \\ \leftTwo >> }
    >>
    \layout { }
    \midi {
      \context {
        \Score
        tempoWholesPerMinute = #(ly:make-moment 76 4)
      }
    }
  }
}