The Spanish Steps are a set of steps in Rome, Italy, climbing a steep slope between the Piazza di Spagna at the base and Piazza Trinità dei Monti, dominated by the Trinità dei Monti church at the top. The monumental stairway of 135 steps was built with French diplomat Étienne Gueffier’s bequeathed funds of 20,000 scudi, in 1723–1725, linking the Trinità dei Monti church that was under the patronage of the Bourbon kings of France – located above – and the Bourbon Spanish Embassy to the Holy See – located below – in Palazzo Monaldeschi. The stairway was designed by architects Francesco de Sanctis and Alessandro Specchi.

More details: https://en.wikipedia.org/wiki/Spanish_Steps