Miss Mary Martin was living in Baltimore, the busy center of commerce and culture on the Chesapeake Bay in central Maryland..

https://en.wikipedia.org/wiki/Baltimore

In August of 1924, Mary received a postcard from her friend, Lorine Hyer, who was in Paris.

The face of the postcard is a nicely-colored photograph of La Porte Saint-Martin – the triumphal arch erected by Louis XIV in 1694 to celebrate his military victories.

The Porte Saint-Martin replaced a gate in medieval fortifications constructed by Charles V (1338-1380).

The medieval walls are largely gone as Paris has grown enormously since that time.

https://en.wikipedia.org/wiki/Porte_Saint-Martin

The postcard was printed in France, but I cannot distinguish a publisher.

On the reverse, Lorie reports that she is “Having a glorious trip abroad”.

It seems that Mary had been a student at Goucher College, at that time a private, liberal arts college for women in Baltimore.

Goucher remains a well-regarded private school although it is now coeducational and the campus is in Towson, Maryland.

https://en.wikipedia.org/wiki/Goucher_College

In her postcard message, Lorine shares that she “met a friend of yours…from Goucher”.

The twenties were a good time for Americans of means to travel abroad, and one hopes that Lorine enjoyed her summer in Europe.

It seems that Miss Martin was pleased by the postcard remembrance as it was preserved in excellent condition throughout her life.