Excuse me, is Palazzo Vecchio on this side?
pa-LAZ-zo VEC-chio — stress on second syllable of each word. The 'ch' in vecchio is /k/.
Ask any local or fellow pedestrian when you are navigating towards a famous monument and want to confirm you are going in the right direction.
È da questa parte (is it on this side) — da questa parte is the Italian way of saying 'in this direction / on this side'. An alternative is in questa direzione. Palazzo Vecchio is Florence's medieval town hall.
Sto andando nella direzione giusta per il Colosseo?
Am I going in the right direction for the Colosseum?
Direzione giusta (right direction) — asks for confirmation of direction
Il museo è aperto oggi?
Is the museum open today?
Useful follow-up when someone is directing you to a monument
Quant'è lontano il Ponte Vecchio da qui?
How far is the Ponte Vecchio from here?
Quant'è lontano (how far is it) — asking the distance
Florence's centro storico is a UNESCO World Heritage Site — almost every building has historical significance. Locals are used to directing tourists and are generally patient with repetitive questions about the same monuments.